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Thank you Jeff. here are some pics 73 kc8dve

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...

Thank you Midnight Special and Sunbulls for the info and links. 73 Richard

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...

Last update... I was looking over the schematic again focusing on the S meter and BAM!!! it hit me. I changed out L8 earlier. L8 with a slight ,very slight adjustment brought the s meter back into full operation. Now onto the next Robyn, lol. Thanks again everyone. 73

Another update... So I did check the for mentioned regulators and resistors and all checked good. While I was looking everything over on the top side I did see a resistor soldered on top of R202. So I thought I would unsolder it and low and behold TX on SSB come back in full. Not sure why they...

Update... Replaced L8 and retuned RX. I now have sufficient audio and the s meter is working on both AM and SSB but still not quite right. If its below S5 it doesn't have any meter movement. The VR1 is working for adjustment and I connected a new meter to verify it wasn't just the old meter...

Yes I replaced c179 when I did the recap. I have also tried 3 different relays still the same issue. I will check on those mentioned diodes and resistor. Going to replace L8 for some reason that slug will not turn. Could tr18 and tr19 show correct voltage but have issue with modulation? 73 Richard

I'm sorry I stated the value wrong...it is a 12pF capacitor I put in. 73 Richard

I did add a 12pF disc capacitor and it moved the slug more to the middle. This did not change anything for RX or TX. Im assuming it was tuned for max already or really close even when it was rimmed. Please let me know if there is any issue with using just a standard disc cap. 73

Update.. Replaced L16 with one out of a parts board. Exact same result in the position of the slug. Shows max at rim level. Instead of using a trimming cap can I use a fixed value cap say 10pf and then tune the slug again? Found bad AM-VR and replaced it. I now have an adjustable dead key. I...

Thank you, L16 is flush at the rim so with what you are saying I should replace L16 is that correct? 73

Where to start?... I have completed the RX alignment. This did help increase the volume of the signal but it is still low. This did not change anything with the S meter, still sits at zero. When you inject signal at the antenna with a generator the s meter works?? I was listening to a gentleman...

Thank you for the link. That explained it all. And what I thought was the can was the unused leg. Thanks again and I will continue on with the alignment. 73 Richard

I started the alignment made it thru the PLL then the next is the AM receiver as shown below. I found TP12 underside and the trace is cut and then the can is soldered to the FET. Compared to another Robyn and nothing else on the bottom side seems to be any different. Would anyone know why this...

I will try the alignment and will follow up. Thank you

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...

OK, So I began by removing the fuse and plugging in a 12v external supply. Unit did not turn on? Looked on back and had to move the switch to 12v, Boy o boy can you tell Im a rookie! So anyway unit still didn't turn on? Put the fuse back in line and it turned on, Now to the power supply...I...

Thank you Handy Andy and Loose Cannon, I will check this out tomorrow and will report.

The radio and power supply have been recapped 2 months ago. The power supply was upgraded to 4700uf 50v. With the voltmeter connected / cb power switch off / plug in the power supply it will register 13.8 for a millisecond and then sits at 11v. Switch power on and it drops to 10.5 volts. This...