[Test-Equipment] 811A Tube Check & 1kw Amp

[Bill Fuqua]

I believe a TV-7 will test 811A tubes and with special adapters 813 etc. I 
built my own transmitting tube tester which pulses the tubes to high anode 
currents.
It works quite well but a bit complex. Earlier this month I took it to 
Dayton to check tubes that I was thinking of buying. Since it
runs off 12 volts I had it on a cart with large sealed batteries and carted 
it around.
   So far it works well with small tubes like the 6146 and 811A  and larger 
ones such as 4CX250, 4CX1500, 4-1000, 3-1000 and should work with 8877A7 
tubes as well.
73
Bill wa4lav


At 11:59 AM 5/26/2004 -0700, Roger Agnew wrote:
>Greetings to the group!
>
>I'm new to the group and new to running more than barefoot power. I will 
>now be running power amps with my Collins S-line, KWM-2A and Icom Pro radios.
>
>I'm wanting to check some 811A tubes in my Hickok 800A tube checker and 
>the 811A or 572B is not listed in the manual or on the "wheel" chart. Can 
>this tube be checked and if so does anybody know what the settings would 
>be? I would also like to know of a good reliable source to have on hand 
>for a tube cross reference chart.
>
>I'm also in need of some 6146, 6146B and 4CX-1000 tubes, any good sources 
>the group knows of would be appreciated or anyone that may have some 
>good-excellent used tubes available for sale please contact me off list.
>
>I will soon be posting to my web site some detailed pictures of a 
>home-brew 1kw amp that an engineer of some 28 years at the University of 
>Iowa built back in the early 60's and ran with his Collins S-Line. I got 
>the power supplies and PA all mounted in an original Collins rack from 
>him. He use to shop the Collins Outlet store in Cedar Rapids. His health 
>is not good and a recent stroke left him virtually blind, although he is 
>available to talk to. He is a true "gentleman" and I would like to 
>resurrect his station, I already have his Collins S-Line station working 
>and it all fired right up and just worked, which says allot for his 
>equipment and Collins. I promised him I would make a contact with him at a 
>friends home in Ames, Iowa using his original station when I got it all 
>going. The schematics he found and included are home-drawn and are fairly 
>complete. The design and appearance of this amp looks excellent, as well 
>as very professionally done with top components.  It's not a hack job! It 
>was working for his last contact in his log book in 1984 and has been kept 
>in his basement clean and dry.
>
>I will be looking for someone in Texas or near Austin to help me fire this 
>amp up, for which I'm willing to pay. If someone is or knows of someone 
>who is experienced in working on this type of amp please contact me. I'm 
>in Quincy, IL in route back to Austin with the equipment in my van and I 
>could stop along the way. Extensive pictures have been taken and I'm 
>working on posting them to my web page very soon. I will provide the URL 
>to anyone who would like to view them.
>
>This is my first post and I will keep future posts a bit more abbreviated.
>
>Thanks in advance for any help the group can provide,
>
>Roger Agnew
>K1KQ
>Austin, TX
>888-536-5500 - Toll Free to my cell phone
>
>P.S. Where and when do you folks in the group hang out on air?
>_______________________________________________
>Test-Equipment mailing list
>Test-Equipment at mailman.qth.net
>http://mailman.qth.net/mailman/listinfo/test-equipment