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Got another old president on the desk today. This time it's an old President Washington (858) version. This one looks to be in bad shape. Upon evaluation: No meter light, channel indicator dim, mode lights dim, radio would almost shut off when keyed, Dust all throughout the rear (where vents in...

Mine: AM skip call: 351 round the Carolinas. SSB skip call: 592 North Carolina. Rag chew call: Hawkeye Ham: KM4VAZ

Yes, NTE-236 can be used in place of a 1969, 2312, etc...for a final. Also, the NTE-235 can be used in place of a 1306, 2166, etc...for a driver. 1969 still has more gain than the 236 and 2312. I would rather have the 1969. One more tip: Around the pre-driver you will see a cluster of...

What has been done previously that the owner wanted left in it: Passthrough regulator changed to an NTE-152. Final replaced with an NTE-236. R131 clipped. Homemade channel board installed. What I did (I do the same with all 2000s): Replaced the 10v blues caps. Checked tolerance of all...

The purple wires are for a variable key. The red meter lights I still have to replace. Thank you for the compliment....

Got another Cobra 2000 that was abused brought back to life. Before: AM - deadkey 7w, swing to 10w peak, swing backward to 4.5w in average. SSB - 10w peak. Homemade channel board checked out. Seems as though it doesn't leak emissions or RF, seems stable. Screwy clarifier mod. Now: AM - 2.5w...

Got a bone stock Uniden Washington (UPD858 - 2 button version) that the owner wants high frequencies installed. He wants to keep the regular 40 channels, plus the high channels (frequencies). Him and his buddies hang on channel 40 on quiet days/nights and frequency 27.8450/ 27.8550 when heavy...

Question: Has anyone tried using RT5's in place of RT1'S or RT3'S without modifying circuits? Got a friend that has an RM Italy 703 he's wanting to replace all the original RT1'S with the RT5'S. Will this swap work without issues popping up or modifying the circuit to make them work in this...

I noticed, the frequencies being presented when probing R74 are actually the VCO frequencies, not the mix frequency which the service manual calls for. Seems like the channel conversion was done wrong or the Adders aren't getting the 8v input they need to be mixed with the PLL frequencies...

Bias plays a big role in forward or backward average swing. Too much current draw in other words. Over modulation. Beefing up the output without beefing up the regulation side of things. Removing limiters. The limiters are there for a reason. My theory is, those limiters in place will prevent...

I see what you're talking about now. Solder joints in that area looks slightly lighter color than the rest of the solder on the board. Is it my eyes, or does it look like someone has been soldering around the Adder chips?

Finishing up this Cobra 2000 GTL that was bought brand new back in the early 90s by a late friend of mine, rest his soul. He bought this radio brand new from cobra back in the early 90s and brought it plus an expo kit straight over to my shop before he even opened the box. I was the one to...

Lot of bad caps in this one. Gonna go ahead and recap this radio completely. I'll get back with you all on the outcome. Note to self: order more caps, lol...

Frequencies from top bare lead of R74: Band A, channel 1 = 17.8571mhz Band B, channel 1 = 17.8571mhz Band C, channel 1 = 16.6371mhz Band D, channel 1 = 17.9171mhz Band E, channel 1 = 17.8571mhz Band F, channel 1 = 17.8571mhz Band A, channel 40 = 16.5772mhz Band B, channel 40 = 16.5772mhz Band...

Trace side: Regulator section: Final section: PLL section: Mic AMP section: Component side: Final section: Regulator section: PLL section:

Got a Ranger SS3900EGHP (aka...American Spirit) on the desk today that's completely dead as far as receive and transmit. Issues: Powers on fine, all lights work, receive/transmit light switches when keying and unkeying as it should. No receive, just light hash noise with volume wide open. No...

Thank you BC, seems like a decent base. Any info on conversion?

Got a local here stating he's interested in purchasing one of the newest Ranger radios called a 29. I can't find anything about a new addition from Ranger called a 29. Anyone else know what they're referring to?

Sorry for delay, had a few others to catch up on. Getting back to this one in the morning.

Thank you guys. This site is so helpful when I get stumped. The other techs on here are the most knowledgeable people I've ever had the privilege of speaking with, very detailed to learn from. They don't just tell you what to do, they explain how the circuit works so you'll learn from it. I...