Same problem here. To get me out of the woods, I had a piece of 1" x 3/8"aluminium bar lying around. I cut it to length and drilled a 3/8" hole through it and then a hole right through the side, to t
Just as an aside, I have just finished refurbishing a Dentron GLA-1000B and I note that it is a Super Cathode design. The Amp Supply LA-1000 and Ameritron AL-84 both use the same 6LQ6 family sweep tu
In my circuit diagram, the control grid of each tube is tied to the cathode. Sent from AOL Mobile Mail Get the new AOL app: mail.mobile.aol.com <http://mail.mobile.aol.com> Just as an aside, I have j
G'day Vic. The Matsushita/Panasonic relay that Rich Measures used in his QSK circuit, published at somis.org, is still available on Ebay. I bought 10 of them a couple of years ago Otherwise, Jim, W7R
Despite the lack of published English data on the Russki caps, Dr Alex, UR4LL is pretty good in steering you towards the correct capacitor for your intended application. He is very approachable and a
G'day Lane. I have the complete set of Ham Radio Magazine on DVDs. I'll see if I can find the article. 73, Alek. VK6APK On 10/01/2019 7:12 PM, Lane Zeitler via Amps wrote: There was an article in Ham
I looked at my discs and I looked at every issue from 1975 to 1986 and there was no mention of the project. I can look earlier and later, if you wish. I also looked at entire 3 Magazine. Same result.
Yep. That's where I bought my copy. Excellent value for an excellent resource. 73, Alek. VK6APK There used to be a web site that had the whole run in pdf format. I think someone bought the rights and
Intermittent grid to filament short. Change the toob. 73, Alek. The grid lg value goes from 0 to off scale in the negative and the plate Ip value from 0 to +150. When this happens I cant get any outp
Same thing happened with a Russian GU84B tetrode in the Emtron DX-2SP, at my local radio club. The resistive cathode to grid connection only becomes evident as the valve heats up. Strange. 73, Alek.
Yep. In my exp0erience, the Chinese sockets are the ones to go for. See http://www.mableaudio.com/en/productview.asp?sid=3113 They have a very tight grip on the pins, which does not appear to degrade
Ha. That's what ya call "thinkin' outside the anode." Cheers, Alek. VK6APK Dont laugh, it is just a part of hams doing what works when needed. I modified several 8874's decades ago to replace the 887
If it's not a rude question, why the heck are messages being vetted in the first place? Ive not seen that occur anywhere else and in my opinion, it shows mistrust and I consider it a gross insult to
Yeah, my local club has a GU84B with the same condition. No short when she's cold but a couple of minutes into the warmup, the belly ache starts and stays. The tube is a display piece. Cheers, Alek.
I had reason to test some unknown 572B valves yesterday. I tested them in an old Yaesu amp. While I was at it, I thought I would try to fix a brand new 572B that has a G-F short. My supplier had alre
Nah. Much simpler would be to come down here to Australia. So, Would running the AMP Up-Side-Down possibly un "SAG" the offending part and the tube work again maybe? You would have to switch side-ban
Ok. I see that you want me to think big. I'll do it again and again until there are no more grid wires left. :-) 73, Alek. Carl I had reason to test some unknown 572B valves yesterday. I tested them
Yes. Do it in your own amp. Install the tube and run the heater and fan only, for a day or two. Very simple. Before you do that, if you have a 1kV Megger, you can test the cold tube, between all elem
Good point Jeff. I run the VK6 Inwards QSL Bureau and I get quite a few cards for VK6FO, a call that does not exist. However, 4K6FO, is an active DXer on CW. When I look at the QSO details on the car
By "refurbished" they mean that they have been sandblasted and then labelled with any label you want to choose. The transistors themselves, are nothing like what is on the label. I bought some, a num