Transcript
Inc.
Web: http: // www. pearl - hifi . com E-mail: custserv @ pearl - hifi . com
❦
Perkins Electro-Acoustic Research Lab, Inc.
86008, 2106 33 Ave. SW, Calgary, AB; CAN T2T 1Z6 Ph: + .1.403.244.4434 Fx: + .1.403.245.4456
Engineering and Intuition Serving the Soul of Music
Please note that the links in the PEARL logotype above are “live” and can be used to direct your web browser to our site or to open an e-mail message window addressed to ourselves. To view our item listings on eBay, click here. To see the feedback we have left for our customers, click here.
This document has been prepared as a public service . Any and all trademarks and logotypes used herein are the property of their owners. It is our intent to provide this document in accordance with the stipulations with respect to “fair use” as delineated in Copyrights - Chapter 1: Subject Matter and Scope of Copyright; Sec. 107. Limitations on exclusive rights: Fair Use. Public access to copy of this document is provided on the website of Cornell Law School at http://www4.law.cornell.edu/uscode/17/107.html and is here reproduced below: Sec. 107. - Limitations on exclusive rights: Fair Use Notwithstanding the provisions of sections 106 and 106A, the fair use of a copyrighted work, including such use by reproduction in copies or phono records or by any other means specified by that section, for purposes such as criticism, comment, news reporting, teaching (including multiple copies for classroom use), scholarship, or research, is not an infringement of copyright. In determining whether the use made of a work in any particular case is a fair use the factors to be considered shall include:
1 - the purpose and character of the use, including whether such use is of a commercial nature or is for nonprofit educational purposes; 2 - the nature of the copyrighted work; 3 - the amount and substantiality of the portion used in relation to the copyrighted work as a whole; and 4 - the effect of the use upon the potential market for or value of the copyrighted work. The fact that a work is unpublished shall not itself bar a finding of fair use if such finding is made upon consideration of all the above factors
♦
PDF Cover Page
♦
♦
Verso Filler Page
♦
♦
Verso Filler Page
♦
PRODUCT REAR VIEW L abels exposed
'''''" , ..... ,
PLUG POSITIONS aligned for insertion
t'
DC CONNECTIONS Power supply to Amplifier
_
SIGNAL CONNECTIONS C ontrol Unit to Amplifier
MAINS POWER CONNECTIONS
The Boothroyd Stuart Meridian range of h igh fidelity units
Connection IMPORTANT - THIS EQUIPMENT MUST BE
requires discrete equipment of top performance. Whilst the
export versions. All Boothroyd Stuart Meridian products
units are very simple to instal we recommend that you read
are
these instructions to obtain the best result s - we draw
a mp l if iers are d ou ble insulated under
have been desi g ned for the most d i scer n in g listener who
particula r attention to the n ote Ori mainten ance .
Positioning The units can be operated in any position with
out a change in performance, but for example, if the three
GROUNDED
(EARTHED)
manufactured to
the
ex cep t in the case of some
h i ghe st
safety standards, the
Cl ass
2 specification.
It is important that the control unit be connected to mains
ea r th and for the power supply, if use d separately f rom the
BS Me ri dian control unit also to be connected to mains
earth.
To
connect
a
101/103
co m bina ti o n
proceed as
units - power supply, power amplif ier and control unit are
follows .
amplifier is p l aced between the cont rol unit and the power
Connect the c ontro l unit mains cord to a three pin plug.
at the base. It is not essential that this plan is used. It is
Brown
stacked or laid side by si de we suggest that the power
supply and that in the vertical format the pow e r supply is
-
(Ground)
Live,
Blue
-
Neutral, G reen/Yel low - Earth
Plug the 103 power supply into the shuttered
possible to instal the- power amplifier and powe r supply
switched power outlet at the back of the control unit. A
dealer's advice on this. The lead between power amplifier
available for ancilliaries, for example a second power supply
some d i stan ce from the control unit.
Please take your
and power supply must not be e xtend ed . Avoid standing
s h uttered
outlet
on the
back of the power supply is
or record turntable. Plug the six pin DC lead into the AMP
the power a m plifier on delicate surfaces. Don't constrict
CONNECT so cket of the power supply and the other end
outer case. U nde r heavy duty
five pin DIN to five pin DIN
airflow around it since it is designed to lose heat through its
the case can rise to higher
temperature t han normal but the unit will automatically
cut out
should
reconnect
the temperature r i se beyond a safe level and
upon
cooling.
should this happen.
No
damage will
be sustain e d
in to the PSU CONNECT socket of the power amplifier. A r evers ing
lead is suppl ied to
connect the SIGNAL OUTPUT socket on the control unit to t he SIGNAL INPUT on the power amp li fie r . Note that th is lead may have a coded end (black sleeve) and this should be plugged into the power amplifier, no damage will
Nll'eor..C1 ""IIIOLtl£'AWJR<y[f1 �...,..,., ..IIIOIMt � """''' ..w::c_l'E.r�o
==�==: l
0-_.
=-=£:::: l=c.-I't.,�o
Tape Record Output Only
All Inputs
"""('.(]IoNe1 �outLlTAMlnal� eoon.owtM.,....� I'OIIfERSUI"'\'I' 0-_.
Left
�,' �
1
3
Right
5
Left Output Right Output
2
Common Ground
Internal view of DIN plug with its cover removed. Connections for Pickup, Tuner and Tape inputs.
result if this lead is reversed but there
will
be no
so u nd .
Some versions of the 101/101C have a 7-pin DIN output socket, in which case a normal5-pin DIN to5-pin DIN lead can be used as an alternative to the reversing lead recommended above. Connect the input to the control unit with standard
DIN plugs, the pickup cartridge sh ou l d
be
the power supply should be connected to a suitable outlet on the preamplifier if available and should be earthed. The
input si g n a l to the. power amplifier is via the five pin DIN
socket pins
3
and
ground.
5
left and right live respectively pin 2
connected in
accordance with the diagram above. Connect loudspeakers
to
the
amplifier
power
using
heavy
gauge
cable.
Performance will be improved if heavy cable of the shortest
possible
is used here. Litz wire and other such pro the 103. If
length
prietary low loss cables are suitable for use with
cable is used we suggest 80/0.2 sq. mm for
conventional
runs up to 5
m.
The tape output is available on a
at -20dBm reference
level (77:5 mV)
D IN
plug
on pins 1 and 4 of
the tape socket. This is higher than DIN standard level and is better connected to many tape machines using a DIN -
RCA ( phono )
lead rather than DIN
your dealer. Route the
turntable
cables
-
DIN;
p l ease consult
so that the leads from the
in particular are kept
as far
as possible from the
power leads or interconnection cables. To connect a power amplifier 103 to another m ake of pre amplifier connect
the
DC
6
pin
lea d between power
supply ( s ) and power amplifier as above, also the loudspeaker connections to the power a mplifier. The mains supply to
Maintenance Normally the Boothroyd Stuart Meridian units need only periodic dusting to keep
them clean however,
if
they are greasy through handling, methylated spirit may be spari ng ly used
on
the
outside
solvent or prop r i eta ry cleaner. No
regular
of the case. Use
no
other
maintenance of the circuits is required. It is
good practice to dean up the connections
in
the system
every 12 months ensuring that loudspeaker terminals have
not become oxidised. Pull out all DIN
plugs and
re-insert
them to dear any contact resistance. This applies expecially to moving coil inputs
unless the
101
has a gold plated
socket and a gold plated DIN plug is employed.
Boo'throyd StlJart reserve'the ri�htto 'imprQveand amend ' 1heir prQducts at any time. Aspects, of the Meridian prpPLJcts are cQverEic,l by B ritisn ahd Foreign patents r'�gi$terec,l d��igns and copyright.
Thi,�
instrucfion
Power SUPQly arid
packing
materials
card will
f.it
Extending the System It is po�ible 10 cnarige 101 to (;.orwenti�mal phonQ frpm mavin'g 'coil and vice versa by e�th a ngi n g a plug-in, module internally. Follow the' in Structi dns supplied wi t h ,the mod.u!e.. It is also PPSS,ible to 'operate Cl p ower amplifier '103 witli twq'power'supplies"tb gi�e ir'npr()vigq pei"fQ�man€Ef., 11'1 th tS case the $econdpoWi'ir supply 'takes its mains from the: first 'and aspedaJ Y leau connects the power amp lHi,er DC input to the two supplies. In this three 'ended lead the ,plug wi,th two wires is inserted '
'
.
conveni'ently' belween
a
Amplifier or-Control Unit. P lease retai'n for fu t u re $,de t ransh df the product s '
,
!
intQ the power ampJrfier. To connect the
10'1 tQ a pair of B qothro Y d StuaFt Meridian AQ�i�e lou(lspeakers fpllow the instructipns wittl tlie Iou d ,
�peaker.
Op�ratinlJ
instructions for'
Control Unit
Supply 103.
Boothrayd
101/101 MC POWer
Stuart
Amplifier 103
Meddian
and Power
the 101 to ,;mother' power am pl i fier a lead 1 and 4 (common g ro u nd pin 2) Qfth� Qu'tP,ut socket, to. the left ,and right in p_u fs respectiv�ly: of the power a mplif ie r should be used. ' ' Iftti� 101' has.a :f ive pin DIN output ,socket UNDER NO CIRCUMSTANCES connect pins '3 arid 5 to the power amplifier,ag these carry.± 15V DC, and may cause damage to SQIT)� power amplifiers,and loudspeakers. The i01 tan' drive any power amplifi i:i'r which accepts a signal input bet ween 100mV and 5V rms. To,
eonne"Ct
which con n�ts pins ,
♦
Verso Filler Page
♦
The Boothroyd Stuart Meridian range of high fidelity units have been designed for the most discerning listener who requires discrete equipment of top performance. Whilst the units are very simple to instal we recommend that you read these instructions to obtain the best results - we draw particular attention to the note on maintenance.
Positioning
The units can be operated in any position without a change in performance, but for example, if the three units - power supply, power amplifier and control unit are stacked or laid side by side we suggest that the power amplifier is placed between the control unit and the power supply and that in the vertical format the power supply is at the base. It is not essential that this plan is used. It is possible to instal the power amplifier and power supply some distance from the control unit. Please take your dealer's advice on this. The lead between power amplifier and power supply must not be extended. Avoid standing the power amplifier on delicate surfaces. Don't constrict airflow around it since it is designed to lose heat through its outer case. Under heavy duty the case can rise to higher temperature than normal but the unit will automatically cut out should the temperature rise beyond a safe level and reconnect upon cooling. No damage will be sustained should this happen.
Connection IMPORTANT - THIS EQUIPMENT MUST BE GROUNDED (EARTHED) except in the case of some export versions. All Boothroyd Stuart Meridian products are manufactured to the highest safety standards, the amplifiers are double insulated under Class 2 specification. It is important that the control unit be connected to mains earth and for the power supply, if used separately from the BS Meridian control unit also to be connected to mains earth. To connect a 101/103 combination proceed as follows.
Connect the control unit mains cord to a three pin plug. Brown - Live, Blue - Neutral, GreenlYellow - Earth (Ground) Plug the 103 power supply into the shuttered switched power outlet at the back of the control unit. A shuttered outlet on the back of the power supply is available for ancilliaries, for example a second power supply or record turntable. Plug the six pin DC lead into the AMP CONNECT socket of the power supply and the other end into the PSU CONNECT socket of the power amplifier. A five pin DIN to five pin DIN reversing lead is supplied to connect the SIGNAL OUTPUT socket on the control unit to the SIGNAL INPUT on the power amplifier. Note that this lead may have a coded end (black sleeve) and this should be plugged into the power amplifier, no damage will result if this lead is reversed but there will be no sound. Some versions of the 10 1/10 1MC have a seven pin DIN output socket in which case a five pin DIN to five pin DIN normal lead may be used as an alternative to the reversing lead. Connect the inputs to the control unit with standard DIN plugs, the pickup cartridge should be connected in accordance with the diagram above. Connect loudspeakers to the power amplifier using heavy gauge cable. Performance will be improved if heavy cable of the shortest possible length is used here. Litz wire and other such proprietary low loss cables are suitable for use with the 103. If conventional cable is used we suggest 80/0.2 sq. mm for runs up to 5 m. The tape output is available on a DIN plug at -20dBm reference level (77.5 mV) on pins 1 and 4 of the tape socket. This is higher than DIN standard level and is better connected to many tape machines using a DIN - RCA (phono) lead rather than DIN - DIN; please consult your dealer. Route the cables so that the leads from the turntable in particular are kept as far as possible from the power leads or interconnection cables. To connect a power amplifier 103 to another make of preamplifier connect the DC 6 pin lead between power supply(s) and power amplifier as above, also the loudspeaker connections to the power amplifier. The mains supply to the power supply should be connected to a suitable outlet on the preamplifier if available and should be earthed. The input signal to the power amplifier is via the five pin DIN socket pins 3 and 5 left and right live respectively pin 2 ground.
Maintenance Normally the Boothroyd Stuart Meridian units need only periodic dusting to keep them clean however, if they are greasy through handling, methylated spirit may be sparingly used on the outside of the case. Use no other solvent or proprietary cleaner.
No regular maintenance of the circuits is required. It is good practice to clean up the connections in the system every 12 months ensuring that loudspeaker terminals have not become oxidised. Pull out all DIN plugs and re-insert them to clear any contact resistance. This applies expecially to moving coil inputs unless the 101 has a gold plated socket and a gold plated DIN plug is employed. Boothroyd Stuart reserve the right to improve and amend their products at any time. Aspects of the Meridian products are covered by British and Foreign patents registered designs and copyright. This instruction card will fit conveniently between a Power Supply and Amplifier or Control Unit. Please retain packing materials for future safe transit of the products. Operating instructions for Boothroyd Stuart Meridian Control Unit 10 1 /101 MC Power Amplifier 103 and Power Supply 103.
Extending the System It is possible to change 101 to conventional phono from moving coil and vice versa by exchanging a plug-in module internally. Follow the instructions supplied with the module. It is also possible to operate a power amplifier 103 with two power supplies to give improved performance. In this case the second power supply takes its mains from the first and a special Y lead connects the power amplifier DC input to the two supplies. In this three ended lead the plug with two wires is inserted into the power amplifier.
To connect the 101 to a pair of Boothroyd Stuart Meridian Active loudspeakers follow the instructions with the loudspeaker. To connect the 10 1 to another power amplifier a lead which connects pins 1 and 4 (common ground pin 2) of the output socket, to the left and right inputs respectively of the power amplifier should be used. If the 101 has a five pin DIN output socket UNDER NO CIRCUMSTANCES connect pins 3 and 5 to the power amplifier as these carry ± 15V DC and may cause damage to some power amplifiers and loudspeakers. The 10 1 can drive any power amplifier which accepts a signal input between IOOmVand 5V rms.
CONNECTION PIN-OUTS: As seen looking at the outside-rear at the pre-amplifiers and amplifiers; or from the internal, or solder side, of the DIN cable-end connectors.
101
101
105
Inputs
Tape
Input
P/B 1
LEFT 3
RIGHT
5
4
Rec 1 LEFT
LEFT 3
RIGHT
5
4
RIGHT
1
3 5 2
2
2
COMMON GROUND
COMMON GROUND
GROUND
USE LEFT INPUT SOCKET
101
101
104
Output
Alternate Output
Output
NIC
3
3
5 2
COMMON GROUND
2
COMMON GROUND
2
COMMON GROUND
SIGNAL
♦
Verso Filler Page
♦
101 CONTROL
UNIT:
1.
DESCRIPTION.
2.
DISMANTLING.
3. ,4 .
DC AND POWER AC CHECKS.
5. 6.
SUPPLY CH ECKS.
CIRCUIT DIAGRAMS AND PARTS LIST.
LAYOUT DIAGRAMS.
1. DESCRIPTION. The 101 is a high quality high fidelity self-powered stereophonic preamplifier-control unit for use in musical applications. There are facilities for 1. R e playing cartridges.
from
dis c
with
RIAA I
e qualisation
from
ph o n o
2. Replaying from a radio tuner such as the MERIDIA N 104. 3. Replaying and recording with monitoring facility from a t a pe recorder or cassette deck. The preamplifier is built on a modular basis with three plug-in modules having the functions of Cartridge Amplifier [ 3 -2] , Equalisation
[3-3] and Output
[3-4].
There are a number of different types of 3-2
to suit different
cartridges, including moving coil types. In addition to this . there ,is a newer range of 'double' modules taking the p l a ce of the 3-2 and 3-3 for use with moving coil cartridges only. A 101 fitted with one of the moving coil modules or with a double module in the fa c t or y is des i g n a t e d 1 0 1 M C . Th e r e is no difference between a 10 1 MC and a 101 which has subsequently had its 3 -2 module changed to a moving coil type of 3 -2 or to a double module. The output module [3-4] is available in either 600 ohm or 75 ohm o utput impeda nces. S tandard units are fitted with 600 ohm modules.
75 ohm modules are marked as such.
In connection with the controls,
it
should be
in the radio, the RADIO tab is depressed. monitor from a tape recorder the TAPE
noted that to bring
Similarly to replay or tab is depressed and
'monaural functioning is brought in by depressing the MONO tab. The only other control is the rotary
ON/ OFF
VOLUME control and a
BALANCE control mounted concentrically behind the volume control. The ON/OFF switch also controls a fused
IEC type mains outlet
at
the back of the preamplifier for powering ancillary equipment. All input and output
connections are made via
DIN
sockets at
the
back of the preamplifier. Also on the back is the mains fuse, a 3. 15 amp [slo blo, T] 20mm type fuse. This value fuse is common to
1
all voltage versions of the 101. The 10 1 is made in three voltage types. 220-240 volt for Europe, 1 10- 120 volt for USA and Canada and 100 volt for Japan. N o 101 units are manufactured with a voltage sel ector. Al tering the vol tage can only be done by changing the transformer . If this is ' not .pra c t i c able, t h e u nit may be o pera t e d u s i n g an a u t o t r a nsformer, b u t care sho u ld be t a k en to e n s ure t h a t t h e transformer has a high enough V A rating to handle any a nc il l ary equipment powered from the mains outlet. or inter a c t i v e lou d s p e a k e r s f rom a
Feeding power amplifiers 1 01 f e d f rom an a u t o
tran sformer will degrade the sou nd and shoul d be avoi ded where possible.
2
2. DI SMANTLING : Ensure that dismantling.
the
unit
is
disconnected
from
the
supply
before
To remove the OUTER SLEEVE [CASE], lay the unit upside down on a soft clean surface and remove the two brass screws in the front foot bar. The unit can now be slid out of the case forwards [fascia attached to the unit and not, the case]. D o not pul l the unit from the case by the panel. P u s h from the back with firm even pressure. To remove the TRANS FORMER,
undo the 4 BA cross-headed screw
[Pozi]
underneath the transformer [see diagram 101A]. The fixing bush can then be easily removed from the transformer. The secondary connections [ green, y ellow, blue] from outside to insi de are crimp-type tags and can be carefullY'withdrawn from the main PCB [see diagram 10 1 B]. Pull t he crimps not the wires. The primary connections go via the fat black sleeving to the mains outlet socket. 'It is necessary to cut the sleeves or s lide them back and unsolder these wires. To remove t h e P C B, u s i n g p l ie r s wh i c h a r e s h e a t h e d w i t h insulating tape or have their jaws otherwise protected, pull off the three tabs. A pulling and twisting a�tion suffices. D epress the switches. The felt pads mounted on the tab levers can now be withdrawn using point-nose pliers [see diagram 101D]. Behind the felt pads are three small screws [c ross-head, pozi] in the top right hand corner of each switch slot. Remove these taking care to extract them. Unsc rew also the two cross-head pozi screws located just behind of the mains outlet tilted outwards. It back by pushing the
the 3-2 module. Depress the top retaining tab socket at the back to enable the socket to b e is now possible, to ease the board out at the fat black sleeve outwards .
To remove the FASCIA or FRON T PANEL, take off the volume control knob and balance control knob using a 0 .05" allen key [part number 173 6]. Remove the nut retaining t , he volume control ass embly u s ing a 9/16"AF box spanner [part number 1965]. U sing pliers which are sheathed with insulating tape or have their jaws otherwise protected, pull off the three tabs. A pul ling and twisting action suffices. Careful ly pull the right hand s i de of the panel forwards so that the left hand side may be unhooked. Great care is needed to ensure that the rubber hook is not undu ly strained or sheared during this operation. To remove the VOL U ME C ON T R OL, take off the volume and balance control knobs using a 0.05" allen key [part number 1 736]. Remove the nut retaining the volume control assembly us ing a 9/16" A F box spanner [part number 1965]. Unsolder the five wires [red black violet blue brown] noting which colour goes to which tag. The control can now b e eased backwards over the transformer s o that the mains connections may be unsoldered.
3
3
•
.
DC AND
POWER
SUPPLY CHECKS.:
The 101 power supply provides a regulated + and 15 volts. These voltages appear at the points indicated on the layout diagram. They also appear- at the 7-pin Din output socket at the back of ' the control unit. Pin 2 [c entre pin] is ground, pin 6 has + 1 5 -
volts and pin 7 has 1 5 volts. Should there be neither + nor -
15 volts, from the transformer should be ch � cked. behind the transformer on the PC B carry
the secondary vol ts The three tags just volts AC on blue and
yellow wires. The green wire [outer tag] is the centre tap. Should EIT H E R the +15 volts OR the -15 volts be absent severely redu ced,
or
remove each module in turn to see if removal
restores the voltage. S witch off when removing or replacing modules. In the event that module removal does not restore the regulated 15 volts the fault will probably Qie in one or other of the voltage regulators [see layout diagram]. On earl·ier 101 units it is necessary to remove t h e P C B from t h e chassis t o change t h e voltage regulators. On later 1 0 1 u n i t s holes will be found in the steel chassis under the regulators so that they may be replaced without removing the PC B.
4
4. A C CHECKS: Thorough
investigation
of
the
performance
of
the
preamp1ifier
can only be undertaken with the following equipmentLow distortion oscillator [LDO] Double beam oscilloscope Mi11ivo1tmeter Distortion measuring set First ascertain the
[DMS]
type of pickup module fitted to the
101.
The
list below gives the approximate sensitivity at 1kHz for 0 d Bm [775 mV] output. Before starting any measurements, ensure that the volume control is fully r ais e d a n d that the balance control i s in the central position and that the UP position.
all
the flip switches are in
i
Feeding a 1kHz signal of the appropriate voltage in to the P H ON O s ocket o n p i n 3 [left] and 5 [ right] should g i v e 7 7 5 output socket pin 1 [left] and pin 4 [right] .
m V at the
Equalisation checks . 10 kHz signal in, output -14 100 Hz signal in, output +13
dB dB
[on 775 mV] [on 775 mV]
Radio sensitivity. mV in at pin 3 [left] and pin 5 give 775 mV output. Tape sensitivity. mV in at pin 3
[left] and pin 5
[right] of RAD IO socket should
[right] of TAPE socket should
give '775 mV output. Distortion checks. D istortion should be checked at +10 dB and at 10 kHz. D i stortion should measure < 0.02% , typically 0. 017 % fitted with output modules up to series 3
for
units
[identified by greenish
PCB marked 3-4].
D istortion should measure < 0.01 %, typically 0.008% for units fitted with output modules from series 4 [identified by blue PCB marked 12 38 4 and up]. D istortion figures for the RAD IO input are the same as for phono. Noise checks. Hum and Noise 2.7 0 hm [2R7] and 5 to 2 ]. Phono [moving Phono [moving Phono
should be checked with a dummy input plug having a resistor between each input pin and gr 0 und [3 to 2 magnet] noise >-66 dBm coil] noise >-61 dBm
[moving coil double module] noise
>-61
dBm
Radio noise >-85 dBm Tape noise >-85 dBm If no signal is present at the output, check the signal at the TAPE output socket pin 1 [left] and pin 4 [right]. This w ill
5
BOOTHROYD-STUART
RS .. 66 r--c:=:r--....:...::-:'=:::'::-'::-'-'4'---- +15V
INPUT
M:;OULE:
DISC
MERIDIAN 101 PRE-AMPLlFIER
L-3�---��� �--�---+--�I�--�+-� ..... _-- ..._--- ..
Gnd - 2
R-5
�----------.---o-+---------
-15 -15V
�..
I
OUTPUT t-mll.E
'RADIO'
12V-
-
25V
':15V RI4 lOOk
r--,.....-t----1'---1>-�p__- .1SV
I50 MAT r-�-O---�>-�-4-d
1i5VModflls only
aCI77B
L-3 O---:--�---1H-i...
CID 10116
R-5
7
RI5 lOOk
T4
RADIO
���n�L
t--------....--+-< . oN t...--'-----o ....-o
RH
560 - _.
- ------------------- _'--_____--0
blue - 1 5V
R3 5k6
TAPE
L- 1
R-4
L-3
R-5
Gnd
-
2
Output to Recorder
R4
13{Q}
5�6
R9 10k.
REGULATOR MC79L1SCP LM320L7-IS
Input from Recorder
2 GROUND
NOTE�ioo� DIN system, looking at the the solder- or wiring-side of the cable-end male plug.
4p7
old
new
RIAA
for different tape input. gives ZOOmV ·sensitivity. .,When output module series J is tilled
