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Oh, and by the way for everyone,? I have also found that eBay is not always the best (or cheapest) place to find tubes. -- *73/Rick* *WA6III * * Every post is created using Linux * *

Steve, I just looked for 8BN8's and found a few vendors that were "out of stock" but the one below appears to have them and the price is somewhat less than $30..... ? maybe their price lists are out

Go to the web site and look? Jim W7RY -- Thanks and 73, Jim W7RY

What was the last version? for the R4C Service CD?

I’ve been looking more closely at the schematic and there’s something around V6 that isn’t right. I know that ceramic caps don’t commonly leak but I’ll need to check them all around the

I guess I was the first. I asked this question in the Drakelist in 2007. Here is K7OAH's answer. https://www.mail-archive.com/drakelist@.../msg06662.html There is also some discussion in the

MCX would be easier bit still a PITA. They are closer in size and come in right angle and also in-line male and female cable connectors that should fit through holes. You would need transition cables

Should read 5 ohms.?Sent from my Galaxy

Along about 1945 (very approximately) it became common to run 6H6 tubes used as series noise limiters with reduced filament voltage. Typically any Ohm resistor in series with the filament.?

?6U8's and 6U8A's are completely interchangeable since the A version only has a slightly different heater warmup time. Either should be fine in the 2-B. I have a couple of sleeves of 6U8A's from my

I have received several direct responses to my connector offer. Here is what I would prefer if someone is willing to take on the project. I would donate all the connectors and cable I have in stock,

I am guessing it would. That’s a pretty shoddy fix on Drake’s part. I would consider rectifying and filtering the filament to this tube. Then you can use the very common 6BN8, of which I have a

All, Mine is missing some. Looks like the screws that hold the top on, are UNC 4-40 - look like about 1/4 inch long. But what sort of head? There is an impossible variety of screw heads out there.

Has anybody actually tried a 6BN8 in a 2B to check for "rectified hum" ? How bad is it? The 8BN8 filament spec is actually 8.4V and .45A. So, Drake runs them at 3/4 of their rated voltage to eliminate

I’m still having trouble. Pulling all of the tubes didn’t help, as the AGC voltage needs at least the 8BN8 and the 6BF6. I’ve started measuring voltages around the 6BF6 and they’re not right.

I replaced the 6U8, V2, with an NOS RCA 6U8A, date code 1970. The AVC circuits can now be adjusted as per the manual and the STDBY / RECEIVE? switch operates as it should. I measured the signal

Tektronix used something that sounds a bit similar: https://w140.com/tekwiki/wiki/Peltola_connector Thanks, Barry - N4BUQ

If anyone needs some of those tiny crimp-on RG-174 size connectors I have lots of them. Had to purchase 1000 of each for interfacing my 7-SP speech processor to the TR-7. (Product long out of

*** I was looking at those handheld D104's... Reviews were not good. Mostly, people said that the PTT switch was cheap & unreliable.

I remember seeing them used on the clock boards for DECSystem 10 and 20. Million-dollar systems. The reasoning behind choosing them are the very small space requirements and the fact that these