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Thanks LC. Thats pretty accurate. I hope to start working on the radio after the holidays. Is there anyone in the Houston area that would like to do the work on this radio for a trade on my 148 and some cash ? I would consider that as this will save me lots of time. Just the recap is going to...
10-4. Looks like I have enough documentation. A counter and some time and I will be off and running.
Are there any members that work on this chassis in the Houston area?
Thanks
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Downloaded the service manual for the trc449 with the parts list.
I looked through this thread and did not see a Sams link for the service manual. Holydvr said he has a paper copy. Is it worth getting the Sams service manual or is the Tandy Corp good enough ?
I swapped the 10.240 crystal with the 148 and no change. Later tonight I will download all service related manuals, locate and order a frequency counter and start looking around.
I have not placed the radio in the PA mode which will require some rewiring. I may have indicated earlier that I...
I have a long day today but will see if I can pull out the 138 and the 148 to see what I need to do later tonight. Sunday will be mostly accounted for also. Either way it looks like I may get some answers doing the crystal swap. Thanks for all the help.
I will order the mic adapter and a couple...
Sounds good. Would it be better to put the 138 crystal in the 148 or the other way around? I dont want to cause any more problems if it can be avoided.
I dont have a 5 pin mic for the 148 and I think that unit may need a mic plugged in to receive. I cannot remember. I could pick up a 5 pin...
Does the 148GTL use the same crystal ? I have a stock 148 with me that I purchased out on the road for cheap and it works. The guy I bought it from wouldn't sell me the 5 pin microphone he had when I tested it as he was short on microphones so I do not have a microphone as the 138 is a 4 pin and...
Thanks. I cannot compare any of the voltages I posted as I do not have the service manual or any other reference other than what members are telling me here. You are the first to imply that there are voltage problems and I was hoping to get some feedback so I thank you for that. I listen to...
The radio quit in the middle 90s maybe early 90s so under 20 years of sporadic use. After some reading, I suspect that the caps are up for replacement but it seems unlikely to be the root of the problem but possible and I guess I could find new problems if I do not replace the caps but fix the...
Agree with the recap. I would like to solve the problem or at least identify the problem before a recap of the radio. This would be easier for me to do everything all at once and be done with it as I do not have proper facilities to work on the radio. I am out on the road in a motorhome setting...
Installed the new C179 cap today and all is fine no chattering no problem and seems to be back to the original problem. The relay is working fine.
I followed up on that low voltage reading in the TX mode on IC6 by checking the voltage coming into the radio at the power plug.
13.42 volts in RX...
I will perform all those checks. I do believe that in the case of transmit that all is completely dead. I have used my meter with a dumby load that does swr, modulation and power. No meter movement on any meter on side band or am. The meter is good I used it to install my 29ltd in the motorhome...
Thanks. That looks perfect. Good price too. Probably will not be using it much past my 138xlr. I will do a search for probes and hopefully get that ordered tonight.
I did pick up the 2.2uf caps yesterday. I will probably have time later in the day to get that intalled then will hopefully get...
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