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All bands. I like the idea of putting the Tiny SA nearby to see if it "sees" anything else going on. I'm going to print these responses and put them on top of the rig so that I remember them when I

Well thought I had it fixed but again without any notice, large spark and bang.? Lost the .82 in the power supply and I suspect the 47 ohm parasitic resistors in the Amp.? I was using 47 ohm 2 watt

You will get more interest if you list installed options. IF filters, noise blanker, AUX7, fans? 73 -Jim NU0C "Robin K4IDC via groups.io" <RobinK4IDC@...> wrote:

Bob makes a good point. Indeed this was my first thought. However in my experience the 40m oscillation is a sustained event. The fact that the meter spike disappears when the VOX delay is set longer

One owner TR7 station available in Nashville, TN. $1500 for all of it, will ship with insurance at buyer's expense, not interested in trades, serious offers seriously considered. All the items work

Steve, is this action noted on all bands? Or only one, namely 40M? The oscillation on 40M occurs up in the 9- to 10-MHz range so the TX LPF may attenuate the signal sufficiently to not indicate on a

Find out where the meter spike voltage is coming from. If it is from the wattmeter sensor you may have a parasitic oscillation. If it is coming from the 2nd IF/Audio board there may be a timing issue.

Look again. It's there, just easy to miss. "Jim VE7RF via groups.io" <jim.thom@...> wrote: -- 73 -Jim NU0C

Whilst we are in discussions over wattmeter readings and so on, I’ve had a chronic anomaly with my TR7A and its wattmeter in CW mode. When I transmit on CW, upon release of the key, the meter swings

The schematic only depicts one 15 amp breaker, when in fact there are 2 of em.

Very clear information, Jim. Thanks very much. 73 de Raoul CE3RY

The following files and folders have been uploaded to the Files area of the [email protected] group. * /Drake_TR-7 Static Arrestor Installation.pdf (

Images: A view of the ALC board in my TR7 #1. The two small beads are original. The large one I added later just because I had one. This appears to be the forward wattmeter feed which would make

Hi Stan, thanks for the photo!? Can't really see the colors of the wires in your? picture but K6PO did verify what I suspected. The first picture I posted had the BRN & BRN/BLK reversed. Now if I

Excellent, Jim. Thanks! 73 de Raoul CE3RY

Image: shortened wires and ferrite beads between HPF and LPF. -- 73 -Jim NU0C

I got kind of busy last week. ?In replacing R3 in the AC-4, I decided to isolate C3 and C4 from the circuit and use a DC PS to condition both of these electrolytic capacitors, starting with a

Does this help? 73 Stan KM4HQE

Hi Paul, Thanks for the quick reply!! Yours has the BRN and BRN/BLK the reverse of mine(which is wrong!) I was to the point where I was going to open up my working L-4PS to see how it was wired!! Not

Many thanks Jim, I'll look in eBay to get some beads. 73 de Raoul CE3RY