Are there any good references on water cooling? Ive a tube Id like to play with sometime. Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.
I don't know about "good", but one issue of QST some years back had quite a bit on converting external anode tube to water cooling. They cut the fins off and made/built/converted to small water tanks
Water Cooling: Jo Jennings, W6EI, installed a converted water cooled 4CX250 in the base of his mobile whip. He converted. I think Eimac subsequently built some water cooled version based upon the res
Not sure what mode you want to operate (i.e. what duty cycle) but if high d/c the duct trick with the blower remoted may have this problem: the 220 fan is normally placed in the cabinet in such a way
I'm sure I'll have something around somewhere. There was reference to water cooled tubes in some of the old Eimac application bulletins. If I get time at the weekend I'll have a dig around the librar
There was an article in QST many years ago called "The Stanley Steamer" which described water cooled tubes. I believe ETO built an amp based on a water cooled tube that Eimac made that had 1500 watts
The SB-220 fan draws air in from the rear and the output is split by the chassis to pass over the socket pins and the glass envelope. It exhausts thru the top and side perforations. Remoting a fan is
Eimac's "care and feeding" has a good bit on water, vapor, and multiphase cooling in section 6. I've always wanted an Alpha 70PV but they're awfully scarce these days .. de w1rt/john ________________
Is the SB-220 such that you could put two 110VAC fans electrically in series and physically stack them? This would run them at reduced power, which would reduce the noise, though I'm not sure how muc
relating to possibly water cooling an SB220 amplifier, "impractical".... I can think of other words, but I'm new here, so I wouldn't want to be obscene. BILL ________________________________________
Thanks for all the replies. Id like to test a Class C industrial tube (Not on a ham band!) Ive had for almost 25 years when I stripped the self excited oscillator for parts. The questions would be ho
Wow, an amp that brews tea. I like the idea. If I build with two tubes do I get a choice of assam or darjeeling? D Add a spigot to the return line for morning coffee or afternoon tea. Don WA4NPL ____
Colin, can you narrow it down a bit beyond 'the fifties'? I have most QSTs from that era but if you or anyone can narrow it below 120 issues..... Cheers Dave Water Cooling: Jo Jennings, W6EI, install
After reading all the suggestions (serious and otherwise), I am left with only one really appropriate and practical option: Leave it the way it is. (a) The tubes ARE graphite anode 3-500Zs, and (b) I
That was the 1971 70V which used a modified 3CX1000A7. It was somewhat troublesome and they soon added the 70A to the mix which used the regular air cooled tube. A short time later the first of the 7
You might want to look at 140mm computer fans. Noise varies from a whisper to sounding like a turboprop starting up. Surprisingly the airflow is not proportional to the noise. The 140's are lower RPM
Guess I should have signed that previous post. 73 Roger (K8RI) _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
If all else fails look in the back of the December issues, at the annual index then you have only 10 issues to search. -- Ron KA4INM - Of what you see in books, believe 75%. Of newspapers, believe 5
!2 seconds on the ARRL site and QST archives with the word "steam" finds May 1966, "Stanley Steamer" by Quinn, W6MJG. Uses a grid driven 4CV1500B (4CX1500B). -- This message has been scanned for viru
Thats real interesting as I was teamed on a jeep mounted transmitter/amp Army project at National using the same tube. That thing was a bear to stabilize 2-30 mHz. Carl KM1H _________________________