开云体育

Hmmm. I’m sure that these all interact. I wonder if that change was implemented when they went to Sylvania finals. Steve Wedge, W1ES Time flies like an arrow. Fruit flies like a banana.

The reason I ask is I'm still wondering why I had to go down to 6pF for C77 (the parallel capacitor across the variable neutralizing capacitor) in order to properly neutralize my rig. I thought

No idea on that one. I do know that they made several changes around then, including changing the cathode resistors from 1/2 watt to 1 watt. That change tells me that the reason the cathode resistors

Not looking to add inventory but will stop by and say hello! My first Dayton trip in a long time. (koff koff Xenia) -- Craig/W8CS Greenville, SC

Hi everyone. Thanks for all the help. I'm going to try and find a copy of the RV7 manual for the future. But I had an idea last night, delved into my spares cabinet where I had my spare PTO. although

+10V, RF out, RIT, and Ground. There is a schematic of the PTO in the RV7 manual. "Stan Gammons via groups.io" <buttercup11421@...> wrote: -- 73 -Jim NU0C

Gary, Yes, I have several good scopes so I can take a look at those points. I'm curious, though, as to where there _should_ be much signal there and, if so, how much, if any, would be allowable. I've

In the early versions of the TR-4, for each of the PA tubes, both of the screen grid connections (pins 1 and 7) had a 470pF capacitor to GND. Starting at serial number 27500 (Version 5), Drake removed

Barry, Well, it must be picked up by the IF.? !00KHz harmonic is exactly 9.0MHz, BFO xtal is off from that by the amount you are hearing.. I bet. Do you have a scope? If so, scope the power supply

Gary, You bring up an interesting possibility and that is the wire from the plate of the oscillator tube is "near" T13, one of the initial IF transformers for receive. Perhaps something is bleeding

Gary, Actually, that wire is placed where I've seen most of them - hooked in a hole in one of the bandswitch wafers. Thanks! Barry - N4BUQ

Barry, Not normal. Drake coupled the calibrator signal into the RX Ant by way of an unconnected wire wrapped around the rx input. Probably someone moved it over closer to the IF. Find the wire and put

How many wires are going to the PTO? Mine has 4, like the RV7 VFO. Red, Black, Brown and Green. Brown is on the right side of the PTO looking at it from the front and all of the others go into the

Bringing to Dayton / Xenia my TR7, PS7 and MN75 Tuner.? All in very good condition, a few scratchs on to of radio, but case repainted by Ron Ron Barker WB4HFN went thru the radio for me a few years

When I switch on the 100kHz calibrator in my TR-4, I get a constant tone regardless of the frequency of the PTO. It's rather high-pitched, perhaps 4 kHz or 5 kHz in frequency. If I recall correctly,

Thanks Gary Didn't want to take it apart lol Regards Mike

I don’t know for sure but in the 4-Line, the wires are attached inside the PTO. Probably why you don’t see anyplace that the wire used to attach. 73, Gary WB6OGD

I see it puts,PTO output into the Translator. Try as i do can't see where the output pin .is. there are two wires fixed from the main board to the pto, going to have to scope them and see which one

As far as I know there is no service manual for the TR5. The manual has a section called Maintenance which has alignment instructions. 73 Stan KM4HQE

I couldn’t remember if there was any TR-3 info in the files. I do have a TR-3 section on my drive where I keep all my radio stuff. I’m sure there were engineering drawings for all of the Drake