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Manuals / Knight KG-670 RC/Tester PDF
« Last post by The Radio Shop on June 01, 2019, 03:04:01 PM »
PDF on the Knight capacitor tester
Test Equipment / Re: SENCORE CB42
« Last post by Crambone on May 25, 2019, 06:53:39 PM »
Ok thank you
Test Equipment / Re: SENCORE CB42
« Last post by The Radio Shop on May 25, 2019, 08:53:54 AM »
Start by checking voltages and AC ripple.  These logic circuits require that the voltage is spot on and clean.
 Also change out any electrolytic capacitors.  At times I have seen the inductors on the counter board go open.
They look like little resistors.
Electronic Video Blog / Re: #119 Sencore CB42 Audio Output Repair
« Last post by The Radio Shop on May 25, 2019, 08:51:10 AM »
I saw your pm today. Been very busy here.
I have yet to get back on working with one of these.  Sometime in the future when time allows.
Test Equipment / SENCORE CB42
« Last post by Crambone on May 11, 2019, 10:14:14 AM »
My CB42 frequency counter isnít showing correct frequency, all numbers light up. I checked power to the top board and Iím seeing the 5v and 10v.
Just not sure weíre to start looking. I looked on YouTube and seen a video by The Radio Shop but it wasnít for counter diagnosis.
Any suggestion on were to start? I did print out all the schematics he had on his site.
Electronic Video Blog / Re: #119 Sencore CB42 Audio Output Repair
« Last post by Crambone on May 10, 2019, 05:15:42 PM »
Is the rest of the video posted? I have one that generates signal but counter reads wrong
It's very good with what you are doing right now.
Got an older IC-7800 that has a blown PA to the tune that it needs a complete replacement board. It burnt the PCB crisp so the parts easily move on one side. It blew the 48V traces off the board, ugh. Seems to me I've seen a thread like that before a few years ago, or maybe I am day dreaming again. I am hoping that ICOM is still making this PA.

Other than that the unit does not power up, no stby light nothing. Some repair shop I don't want to name here in CDN had opened it and did some damage to the Ant. SW unit. I do remember that ICOM had problems with the early version PSU's. So I am hoping that the problem is due to the 48V being shorted (because of the PA) or the 15V rail or the -12V rail dead, anyway... something along these lines...

I am not really a stranger to big radios like that, but fixing this is gonna be $$$ and slow. Maybe call it my summer / fall project.
Ham Radio Circuits and Repair / Re: IC-751 PLL weird problem
« Last post by VE1IC on May 05, 2019, 08:53:11 PM »
anyone has a working PLL unit for sale? I am not sure but if the 745 has the same board than the 751 has. It looks the same...
New member welcome / Re: Hi all
« Last post by The Radio Shop on April 27, 2019, 09:01:31 AM »
Hi Steve and welcome.
Nice setup and at times we have to do the best we can.
HF mobile can be quite fun. I had a TS-140 and home brew HF antenna and had a great time with it.
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