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I have an older 811 I bought from a gentleman that used it on 11 meter. I open the cabinet and it did not have any of the update / safety mods done to it. I ordered all the upgrade kits from W8JI and a new set of 811 tubes. I tore down the inside cleaned up and added the updates. I noticed that...

Hello, I have acquired a Cam 88 that did not come with the mic. It has a 4 pin plug but looks to be about twice as big as the standard 4 pin plug that we know as the standard now. I have searched the web for mic plugs but I am not finding any that will work. Does anyone know if there is a...

I have a Robyn 520D that I am working on now. The gentleman stated that he put it up 12 years ago working and when he fired it up recently it didn't work. So when I started here is what I got.. Extremely low receive-AM/LSB/USB but you can hear the hiss increase with the volume. I have to turn...

I was talking on the unit the other day and all at once my clearifier was off. I had to move it to the 3pm position to RX/TX on freq. I took the cover off and my power supply is only producing 11v plugged in radio off. 10.5 v radio on RX and 9.8 on w/MOD TX SSB. I do not have a service manual...

I recently acquired an 811. The gentleman I got it from said the soft key was bad and was just using a foot pedal. I'm trying to figure out what exactly does soft key mean? Is it a buffer for overloading at key up? If so I already have an ARB 704 for my Icom. Would this work until I can get the...

I have a gentleman that has a Swan 1200-w with 4 31LQ6 tubes. The manual states it has 4 6LQ6 tubes. I think it stated it needed 100-125 w of drive and would do 1200 w peak on SSB. I am interested in purchasing this from him as it covers 80-10 meters. Im assuming the 4 31LQ6's was a conversion...

I have a 568 BLYC transistor pictured below. I am unable to find any information or cross reference on this. Can anyone help? Its out of a Boomer RX-100 Thanks

I am currently working on an amp that does not have any power output. It is running a 2290 into 4 2879. When I started to work on it, was producing 200-300 watts. It should be around 800 I think. I got inside and found a few small issues, replaced a bad solder joint on the hi/lo power switch...

I have come across a CD44 rotor that is 8 wire and have the opportunity to get a CDE H-IV controller box that is also 8 wire. I know the H-IV controller is to work with the CD45 rotor but does anyone know if it will operate the CD44 rotor properly? 73's Richard

Good morning, Can someone please explain what exactly these two circuits do? All I know about them is people do mods to them to get/show more swing and I know that's not good. I'm not wanting to do mods to these circuits I just want to understand what it is they actually do. Is the mic limiter...

Hi there, I just received a Super Jopix 3000b 10m base transceiver. The gentleman who gave it to me said when he plugged it in he smelled smoke and then shut it down. I did find that the reverse protection diode was bad (burnt the board). I replaced the diode and now the radio powers up. This...

Hello again! I have been able to bring this Teaberry back to life with your guy's help. I have a situation now that doesn't seem to make sense. To me anyway! I should mention a couple of things.. Xtra channel and clarifier lock have been performed on this unit. It is up and running with full...

Thanks for taking the time to read this. I picked up a TB Stalker XV base. When first plugged in it turned on, indicator lights and channel selector. I noticed there was no sound (yes the mic was plugged in) so I plugged into the headphone and external sp jack but still no sound (I do here...

Hello everyone, I just picked up a Cobra 2000 GTL. It has been recapped and aligned. It currently has a dead key of 3w. I would like to decrease it as well as the modulation swing for AM and SSB. Can anyone help me with the correct location and procedure to do this?

I have a 2000 that I am returning back to factory condition. I see that there has been several mods done and I have removed them. I currently am having issues with trying to figure out which wires go to the tone control and the voice lock control. I have very limited knowledge on reading...