Much better look then all those other light organs nowadays and much easier to repair if something is wrong. 73 Peter, DJ7WW --Original Message-- From: amps-bounces@contesting.com [mailto:amps-bounce
Hi Charles, The EBM-Papst model G2E085-AA01-01 will be sufficient for the 8877. Of course, any blower will cause more noise then a fan. If the tube is not run at full dissipation you can always reduc
The old Compaq Proliant rack servers are ideal, all 19" and plenty of height. Here they are still sold quit cheap on Ebay from time to time. I used a Proliant 2000 for a 2x 4CX1000 (with the small so
That is no ALC overshoot, but the breathing power supply 73 Peter, DJ7WW I thought you would like to know what a friend of mine found on his new (less than 1 year old) FTDX-5000 for ALC overshoot...
Amps like that have been common for Swiss (Zellweger) and DDR (RFT) military. 73 Peter, DJ7WW Every once in a while we revisit this topic. I will just cut and paste the following from some time ago.
Hi Alek, What extra dissipation by reduced power? In class A current and voltage is constant whatever the drive is. 73 Peter, DJ7WW G'day Charles. A small correction. Do not run a Mark V in class A a
Nonsense. That the GS-23B sells on Ebay for 120US$ does not mean that it costs that price if bought new from the factory. An even cheaper tetrode tube at the same power level is the GU43B. Reason you
He certainly makes sockets for any tube. I already got his quotation for other tetrodes like TH347. Sockets are not really necessary it is just easier to swap tubes. On my 2m amp with YL1056 the scre
The BBC T-2000-1 is in that power class as well: http://tubedata.tigahost.com/tubedata/sheets/120/t/T2000-1.pdf 73 Peter, DJ7WW While the 2000T is likely the highest dissipation tube that worked up w
Corrected by Svetlana? Please send a copy of the revised data sheet of the GU74b. 73 Peter, DJ7WW The 800W labeling of GU74B wasn't fraudent, but a pretty fair. If this tube was designed by EIMAC, or
The exciter should be better then any linear as IMD is worsened by the amp. By the way, no European manufacturer ever used triodes for RF amplifiers except before the time tetrodes were invented. 73
Hi Peter, Which factory built those? I am only aware of Thales, R&S, Telefunken, Siemens, Philips, Racal etc, and the Marconi and BBC transmitters described on this web site: http://www.transmitter.b
Friend of mine converted a medium BC amplifier to 80/160m in the early 80s. Output 90KW into a 20m high vertical , report on 160m near London on the middle of the day was given by phone: S9+40db. 73
The input impedance of a single GS35B is much lower then that of pair of 3-500Z 73 Peter, DJ7WW pieces? W8Ji recommended low impedance coax. 3 pieces is lower than 2 and I have the room It seems just