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Steve, I smelt no smoke and saw no burnt resistor. As far as I can see from the schematic only the following parts are used on 40 meters: L1, T3, C4 and C7 (inside T3), T8 and T10 - and of course the

Thanks Gary and Jim. On the radio working I don't remember having it up on those two bands before but I expect it did work. In cleaning the female connectors on the VCO board I used a GUM Proxabrush

Ah yes, a Molex issue. I knew I had seen that somewhere before but did not think to check Drakelist. Another thing to do is inspect the female connectors looking into the pin holes. If you see a large

Gary- About 50mA, keying in CW mode. In Tune mode, about 90-100mA. comcast.net_at_groups.io_lastradioman@...> wrote:

Do you get idle plate current when you key the radio? Gary W0DVN

It is worth asking, did the failure of your VCO board (displaying 51.950) occur on its own? That is to ask, did the radio work properly and then just fail or has it, as long as you have had it, always

Gary- Using an AC4-R supply. PA plate, plate, filament, dial light and bias voltages are getting to the T4XC. Dead driver or finals? comcast.net_at_groups.io_lastradioman@...> wrote:

Thanks Tom. I printed that off but hope that is not the problem. 73, Jim VE1RB [email protected]> wrote:

In 2010 there was a thread regarding the Drake TR-7 display showing 51950.0 on the old retired Drakelist. The thread is archived at https://www.mail-archive.com/drakelist@.../msg13119.html

Hi Guys I'm working on restoring a Drake RR2 receiver , however I don't have any manual which makes kind of hard. ?I have seen that somebody offered CD or DVD with many Drake user and service manuals

TNX for the info. I'll have to look into this. I had seen some other comments pertinent to these receivers and never found an answer... FWIW, I only ever use the CD input of this receiver now to

One would assume that, since the DR7 gets the right answers on the low bands, that the DR7 is reading wha it sees on the high bands as well... Gary W0DVN

Of course that assumes that the counter is reading the signal correctly. Best to eliminate everything else before tearing in to the VCO board. If extender boards are not available U502 checks can be

If you happened to prefer a CW note that is, say, 400 Hz, it might be nice to center the PBT to optimize for a 400 Hz note. The same would be true if you preferred a 700 Hz tone. In an old-fashioned

What, if any, is the advantage of doing so? Just curious. 73, Steve W1SRD

Make the following check: Then: The math tells you that the VCO is operating at 100 MHz! No “N code” faults could produce that high frequency. There can't be anything wrong with the circuit before

Mine didn't have that so I made my own. Now I wished I had just ran another piece of coax.Sent from my T-Mobile 5G Device

Here it is. A screw with a plan head no slot or anything. Just some knurl around the outside and a nut.Sent from my T-Mobile 5G Device

The shorting trace would be obvious if you have the later circuit board. A single wide trace running from front to back with a hole for a wire at each end. The idea was to unsolder the coax center

I think I understand. The filter board itself had a way to bypass it. I kinda made my own shorting trace.?Sent from my T-Mobile 5G Device