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Rascal Flatts did a damn good cover and maybe even better then this original with Tom Cochrane.

First time I heard the song ”Layla” with Eric Clapton was in a movie were a DJ played it from a radio station, but no one seems to know what movie it was in. I also remember, from the movie, that someone was riding a horse over a field and in the horizon there was a tower with a red light at the...

Yaesu line FR-101 & FL-101 and not the one with digital readout. I still have it and use it quite often.

WOW!! :LOL: Quite confusing and sorry for D51 which is now corrected! It should be only a few millivolts on TR43 base when VR16 is fully CW and once again due to the fact that it puts R205 to DC ground. My schematics might as well be confusing but have a look at the different calculations I made...

No problem Cable Guy! It is my first go-to software when I make simple schematics and I love it because how the symbols look like. It is a German software called sPlan 8.0 and you can buy it for only 49.9 Euro which would be about 50 to $55...

I just assumed that increasing the quiescent current would be to turn the potentiometer CW, but you are probably right. Well ... to me this is very strange that you never get nearly 0 volts when the viper is at the end that effectively shorts the voltage to ground at R205 and it makes me think...

Yes you are right rixdafix that L30 wont affect the idle current which is BTW a static measurement. Please add your measurements into the schematic I made and then we will see. Sorry for changing the original schematic, but my intent is to just lift out the circuit of interest. Please let me...

Like a friend of mine said when he got into RF: "this is black magic"! In some cases it seems at first quite obvious what could be wrong, but when it comes to electronic and especially RF stuff you will have to be humble due to the fact that dealing with what seems easy is many times the...

When the viper is in its most upper position in the schematic the base is basically shorted to ground at DC so there should not be any current flowing through TR43 collector to emitter unless it is faulty.

Since you cannot bring down the idling current to zero and adjusting VR16 has no or small effect, I would suspect a burnt resistive track caused by a short in TR43 collector to base or a bad ground connection to its viper and probably is also D51 gone open as was pointed out earlier.

I can really recommend the book "Understanding & repairing CB radios" and it is probably the best book ever on this subject. I bought mine in the end of the 80's as far as I can remember.

I have both ham and CB tube radios in my shack and now you got me thinking about EMP and that is good thinking these days! I am working a lot on electronic and electrical stuff in E-tec snowmobiles and these fuel pumps are from E-tec's. A friend of mine owns them and I promised to test them all...

This Royce belongs to a good friend of mine who is a collector and he sends me radios to fix quite often and I find it to be both a relaxing and a real fun job. Yes, this Royce is a real beauty and it sure is worth to bring it back to a descent life. I must say that this radio is very thankful...

So the Aromat TX/RX relay finally arrived and already soldered into the Royce 642. I know people like pictures so I pass some from my shack as well as both the relays - Matsushita & Aromat.

I kept some of them for the same reason and when I get to old and my interest for radio fade away I will give them away for free if someone wants them. I love these old Midland 13-885 which also was my first SSB rig. The very first thing to do with these radios was to modify them to run on...

I can only come up with two causes to this mysterious capacitor and that is wrong polarity, which it is not as unit_339 stated, or a bad capacitor and since you fed the regulator from a battery, or DC supply, we can leave out all the thoughts about excessive ripple. The zener diode (7V5 1W)...

After lots of searches for a relay with same land pattern and pinout I realised that I will have to bite the bullet and buy it from Ebay. The part number is Aromat HB2-DC12V AW622198. I placed the order today and now I will have to wait for the shipping from China. :giggle: Attached is part...

Thank you for the link nomadradio! It seems that it is used relays so think I rather buy a brandnew. I agree that the pinout is a bit odd and have to admit that I have never had such a relay in my hand as far as my memory serves me and been into electronics for nearly 35 years lol. I will have...

Thank you TM86 for pointing that out! It seems that there are quite a big number of relays with HB2 board pattern. I will certainly have a look at these relays because the one in this radio only switches the power rails for RX and TX and the coil is controlled by the PTT so nothing fancy really.