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Email from KB2LJJ
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Service notes on TR-2200A TRANSMITTER 1. 2. 3. 4. 5. 6. 7. 8.
No TX RF output: Bad 2SC1169 Q9 on X56-1210-11. No TX: Shield plate touching to circuit board under Q8 driver 2SC741. No TX: Open D2 MI301 on X5501130-01. No TX: Repair broken RCT line from crystal deck to TX oscillator. No TX: Bad Q13 2SA562Y. No T13 voltage on TX X56-1210-00. No modulation: Bad D4 1s1658 on X56-1210-11. No TX: Capacitor C21 lead touching to ground at Q4 on X56-1210-11. No TX: No collector voltage to Q7 Q8. Bad Q15 2SC735 Hi/Low control for Q14 on X56-1210-11. 9. TX distortion: Check D3 Zener 9 volt supply regulator for TX low level stages on X561210-11. GENERAL Note On TR-2200A 1. Battery plate overheats: If the red and yellow leads of the external DC cord are connected together, the battery plate will overheat. RECEIVER 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
Receive Sensitivity poor: Bad 10.245 MHz xtal on X55-1130-11. Receive Sensitivity poor: Bad MI301 D4 on X56-1080-00. Receive Sensitivity poor: Bad Q1 3SK41L on X55-1130-11. Bo battery operation: Miscontact of internal switch in power jack. No C9 B+ to receiver: Bad Q12 2SC496 on X56-1210-11. Batteries will not charge: Check for a shorted battery plate. Low Rx sensitivity: Bad D3 1S2588. No squelch: Check Q15 2SC458 on X55-1130-11. Poor squelch when cold: Replace D14-16 1N60. No audio: Bad qudio IC NPC575 Q16 on X56-1210-11.
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Email from KB2LJJ
Adapting the TR-2200A antenna to early Trio and Drake Portables. We have had several inquiries about adapting the TR-2200A whip antenna to the Drake TR-22C and Trio TR-2200. We now have a kit of parts to do this. Following is a copy of the instruction sheet supplied with each kit. TR-2200 Antenna Kit Instructions No.
Part Name
Part Number Qty
1
Whip Antenna
T90-0082-05 1
2
Antenna Connector
J32-0230-04
3
Washer
N19-0282-04 2
4
Insulating Ring
N19-0283-04 2
5
Antenna Lug
E23-0097-04 1
6
Nut
N14-0116-04 1
7
Pipe
F29-0018-14 1
8
Ground Lug
E23-0015-04 3
9
Screw
3x6 mm
10 Cable with Capacitor
1
1 1
1. Remove original antenna. 2. Enlarge antenna hole to 9.5 mm. 3. Install parts 1 thru 8 as shown in the exploded view below.
4. Remove coaxial cable that runs from the original whip antenna th the SO-239. 5. Connect original coaial cable from terminals ANT and E to the external antenna connector (SO-239). (This cable originally went from terminals ANT and E to the whip antenna.) http://www.kb2ljj.com/data/kenwood/tr-2200a.htm (2 di 3)30/08/2009 19.53.35
Email from KB2LJJ
6. Locate the 2 "L" brackets mounting the TX unit to the side and install 2 ground luge between the bracket and the side out the unit. 7. Install the coaxial cable so that the end with the capacitor is at the SO-239. 8. Solder the free end of the capacitor to the center pin of the SO-239 and solder the coax braid to the ground terminal. 9. Mount the last ground lug with 3x6 mm screw at the hole next to the whip antenna. 10. Solder the braid of the supplied coax to the ground lug installed in Step 9 and the center conductor of the coax to the antenna lug 2. 11. Carefully solder the coax braid to the 2 lugs installed in Step 6. (See diagram below.)
(This modification are sent by Packet system)
Remember it is Illegal to transmit out of band. This Modification is for Informational purposes ONLY. Doing such modifications on your radio may void any warranty and damage your equipment. All mods found on this database are offered to me by other amateur radio hams or captured by Packet system. KB2LJJ take no responsibility or liability for any damage done resulting from any modification.
I have been trying to help our ham radio with the radio modifications and have asked for any type of new radio mods. However, I haven't received too many. If all of you contributed a little more, I believe I would be able to help all the other ham's that are looking for these mods. I know it is possible to get more mods from all the Ham's because of the wide range that exist throughout the world. By doing this we can flourish and enjoy more of this hobby that we've taken part in for so many years. Furthermore, I ask you not to forget to send me any modifications that you might have through email. I would really appreciate it. Email
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73's John Ribeiro KB2LJJ
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