http://groups.yahoo.com/group/TS-520_820_530_830/ KENWOOD TS-520_820_530_830 Thu, 23 May 2013 12:24:26 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42211 http://groups.yahoo.com/group/TS-520_820_530_830/message/42211 Oh I forgot to mention I would not connect my Cantenna rf detector to the Plate of the Driver tube or any place where high DC voltage is present as the circuit Thu, 23 May 2013 12:14:28 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42210 http://groups.yahoo.com/group/TS-520_820_530_830/message/42210 Are you talking about using a the RF detector circuit on a Heath Cantenna for an rf probe to run TX Level Diagram or troubleshoot low level RF circuits? If so, Thu, 23 May 2013 11:25:35 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42209 http://groups.yahoo.com/group/TS-520_820_530_830/message/42209 Paul: Remind us again what are the current symptoms? For example: No ALC on all bands and no RF output on all bands? OR-- No RF output just in Tune mode OR--No Thu, 23 May 2013 10:41:44 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42208 http://groups.yahoo.com/group/TS-520_820_530_830/message/42208 Learning and training is not "chatter". You are looking at classic Electronics 101 2x scaling error. Your Wavetek attenuator is only accurate when rf output is Thu, 23 May 2013 03:41:20 GMT Jim http://groups.yahoo.com/group/TS-520_820_530_830/message/42207 http://groups.yahoo.com/group/TS-520_820_530_830/message/42207 All this chatter about RF probes and VTVMs made me pull my Heathkit out of the cabinet. I've been using my scope for most measurements so I wanted to see how Thu, 23 May 2013 02:25:58 GMT paul.nussbaum http://groups.yahoo.com/group/TS-520_820_530_830/message/42206 http://groups.yahoo.com/group/TS-520_820_530_830/message/42206 Terry, Apologies for making you think I was not paying attention. I'm still trying to collect the things I need. There are things I won't really understand Thu, 23 May 2013 00:11:11 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42205 http://groups.yahoo.com/group/TS-520_820_530_830/message/42205 If you want something to do while waiting on construction or purchase of your RF PROBES you can take the DC voltages at the socket of your new Driver Tube. Wed, 22 May 2013 21:56:28 GMT k7mks@... http://groups.yahoo.com/group/TS-520_820_530_830/message/42204 http://groups.yahoo.com/group/TS-520_820_530_830/message/42204 Clean and working as it should BUT  missing the cord from the stand to the radio.  Substituted the cord from another MC-50 and all is A-OK!.   $35 as-is + Wed, 22 May 2013 21:12:50 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42203 http://groups.yahoo.com/group/TS-520_820_530_830/message/42203 Stephen: Yes you could remove it and see if rig tunes as it did before and does not require significantly more CAR level. This would tell you that Carrier Wed, 22 May 2013 20:49:09 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42202 http://groups.yahoo.com/group/TS-520_820_530_830/message/42202 This is the final time I will respond to this. I have tried very hard to describe what you need to perform TX Level Diagram testing. When you post a request Wed, 22 May 2013 18:55:18 GMT michael Miller http://groups.yahoo.com/group/TS-520_820_530_830/message/42201 http://groups.yahoo.com/group/TS-520_820_530_830/message/42201 Hi Paul, when I needed a RF probe I went on line and made a simple one from plans that I found.  Used and RCA connector on top of my dummy load, output side Wed, 22 May 2013 18:50:17 GMT kd0fds http://groups.yahoo.com/group/TS-520_820_530_830/message/42200 http://groups.yahoo.com/group/TS-520_820_530_830/message/42200 OK, Thanks, Terry. I have had a chance to read all the replies and do some more searching on this amazing forum. I think you have provided enough clues for me Wed, 22 May 2013 18:17:33 GMT paul.nussbaum http://groups.yahoo.com/group/TS-520_820_530_830/message/42199 http://groups.yahoo.com/group/TS-520_820_530_830/message/42199 Replaced the driver in my 820S, still no ALC in TUN mode, want to run the TX level measurements. Anyone have a spare RF probe? Thx, Paul AD5FT Wed, 22 May 2013 17:08:50 GMT Terry Wagoner http://groups.yahoo.com/group/TS-520_820_530_830/message/42198 http://groups.yahoo.com/group/TS-520_820_530_830/message/42198 1. It is only called the 14vdc bus. It will not supply 14vdc to the boards where you see 14 indicated at a pin. If you measure at the Rectifier board you Wed, 22 May 2013 16:16:52 GMT Brad Allen http://groups.yahoo.com/group/TS-520_820_530_830/message/42197 http://groups.yahoo.com/group/TS-520_820_530_830/message/42197 You do not have to go to Heil only, you can hit any audio store and ask for a matching transformer for the Mic. It is a device that goes inline. I have a few