I need to replace one set of tubes for my ACOM2000A. Can anyone confirm that GU74B is the correct tube? If not, what is the correct tube? Does anyone know of a reliable source for the ACOM200A good q
GU-74B is the correct tube and here's a link that I have used with no problems https://www.dxengineering.com/parts/plb-4cx800a-t I have bought off of ebay with real horror show results. DX engineerin
Hi Guys, could not pass, this, over the price... At least 10 years ago at Friedrichshafen messe, Hamradio, I have had bought a pair of GU74B (NOS) for 170,00 Euro... That was on stand of Ukrainan ama
Have a look at the new price at DXE! I have bought some from Jay@ Array Solutions. PRICE? 73s Bob W5RG could not pass, this, over the price... At least 10 years ago at Friedrichshafen messe, Hamr
I paid 80,-DM for a pair in 1999 and never saw a 4CX800. GU74b is specified with 600W anode dissipation. 73 Peter, DJ7WW Hi Guys, could not pass, this, over the price... At least 10 years ago at Frie
HI Peter, soo, those are different tubes? 4CX800 and GU74B? I have in my both Alphas 91b, GU74B... Peter that was a damn good deal.... But, then Golf costs 15000 to 20000 Dem, today, similar figures,
When I used to own an Amp that used that tube I had very good luck with buying tubes from Dr Alex, UR4LL.http://www.ur4ll.net/#tetrodes73,Gary K9GS -- Original message --From: Bob Gibson via Amps <am
Always contact Dr Alex first. He is trading at the moment. His inventory is somewhat limited due to the horrors that are happening in his country but it is well worth contacting him. See http://ur4ll
If you have a perfect antenna/coax system with no mini arcing occurring, the Acom 2000A is a fantastic amp. WOW, $2,000 for new tetrodes! GL, John KK9A GU-74B is the correct tube and here's a link th
Author: gudguyham--- via Amps <amps@contesting.com>
Date: Thu, 24 Nov 2022 17:59:52 +0000 (UTC)
There has been some jibberish that the Chinese might be making a new version of the Russian GU74B. I have not seen one yet and Ill believe it when I see it. Until then AFAIK all GU74B tubes are all
I believe John is correct that all GU74b tetrodes date from the Soviet era, whether used or NOS. I was fortunate enough to buy a dozen of them for $360 when demand was still low. I ruined one them by
Beware that tubes marked Thompson are not the same as the classic Thomson tube company of France. Even that company is no longer Thomson, bean counters sold the name, and now its Thales, a major Fren
4CX800 was a Svetlana part number, doubtless chosen to match Eimac's nomenclature. Vyne Antennas in the UK used to support Acom products and supply tubes. They had a test setup for conditioning and m
Doesn't look like Array Solutions has any GU-74Bs at the moment but they will test them for you for $35 each. Pretty good deal since they usually go up one at a time and you are left wondering which
Author: Håkan Eriksson via Amps <amps@contesting.com>
Date: Fri, 25 Nov 2022 15:26:28 +0100
Hello maybe - Dx engineering has. I bought mine from Acom when I bought my amps. GL / Hawk SM5AQD Skickat från min iPhone _______________________________________________ Amps mailing list Amps@contes
Array Solutions no longer sells Acom amplifiers so it is unlikely they will restock their GU-74B stock. Array Solutions now sells OM Power amps which use FU-728F tube(s): https://www.arraysolutions.c
Hi, I want to thank everyone for their responses to my questions! I am going to pursue some of these options after I hear back from Val at ACOM. Tnx again and 73 Bob, KQ2M On 2022-11-23 17:50, Yueh H
Is there some reason why you can't disconnect the anode or remove one tube and test the other one in your amp then switch to the other socket to test the second tube? Basically run a two tube amp wi
Author: Boye Christensen via Amps <amps@contesting.com>
Date: Sat, 26 Nov 2022 11:59:49 +0100
Hi I don't know ACOM2000 Amp how it is built e.t.c. To take one tube out an test no 2 will be ok with lower input PWR and Output PWR ! To disconnect Anode Voltage will be a fatal error, without any
In the Alpha 91b, when a tube went bad it took parts with it. So trying the tubes to see which is bad was not a attractive option after fixing the power supply. -- Later, John Bodine/WU2E ___________