Actually some Eimac's tubes were OEM in China.
Hsu
----- Original Message -----
From: "DAVE WHITE" <mausoptik@btinternet.com>
To: "'Amps'" <amps@contesting.com>; "Peter Voelpel" <df3kv@t-online.de>
Sent: Thursday, January 08, 2009 8:47 PM
Subject: Re: [Amps] 3CX1500D7 quote
> Hi Peter
>
> Well I think you must have had more luck with the Chinese tubes than I have.
> Maybe they've improved.
>
> I find it's a very hit-and-miss process with Chinese tubes - either they're
> great or they're hopeless and in some cases don't even fit the socket.
>
> I suppose that as the industry matures in China, we'll start to see branded
> tubes and we'll know which factories produce the good stuff and which don't!
>
> In the end, I came by a few Eimac 3CX3000F7 pulls very cheaply at Dayton so
> used one of those for my big HF amp instead of - as I'd planned - a pair of
> GS35Bs
>
> Looking at the way the UK Labour Government has trashed the economy and the
> subsequent Sterling fall against just about every currency (30% against USD
> in the last 6 months, parity with EUR) I'm glad I'm not in the market for
> buying big tubes right now.
>
> Maybe I should have hung on to my box of GS35Bs - I could have doubled the
> UK's export figures!
>
> cheers
>
> Dave G0OIL
>
> --- On Thu, 8/1/09, Peter Voelpel <df3kv@t-online.de> wrote:
> From: Peter Voelpel <df3kv@t-online.de>
> Subject: Re: [Amps] 3CX1500D7 quote
> To: "'Amps'" <amps@contesting.com>
> Date: Thursday, 8 January, 2009, 12:22 PM
>
> I bought 10+ GS-35B at 40.-DM in 1999.
> Most have been given away to ham friends shortly after for their projects,
> others were used to convert linears.
> I should have bought 100 that time as well as GU-78 which were around 80.-
> DM at that time, sockets cost 40.-DM then.
>
> With Chinese tubes my experience is very good so far.
> I converted a couple of TL-922 and L4B to Chinese 3-500Z, those are really
> nice tubes, much better then the Eimac.
> A factory nearby is using around 400 8877 from China in their generators for
> glass coating, they paid 450 US$ each.
> The tubes are used at voltage regulators for magnetrons and replaced Amperex
> 4-400B which went out of production 4 years ago.
> Two are in use at ham friends now for about 3 years, those were pulled after
> about 1000 hours.
> Grid current is still less then with the Eimacs at same output. Since the
> tubes are very reliable, I could not obtain additional pulls.
>>From all the 400 tubes none was replaced so far.
>
> 73
> Peter
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com] On
> Behalf Of DAVE WHITE
> Sent: Donnerstag, 8. Januar 2009 12:15
> To: Tony Brock-Fisher; Amps@contesting.com; Carl
> Subject: Re: [Amps] 3CX1500D7 quote
>
> "Id take an 8877 over a Ruskie any day"I guess it depends on price.
> In my
> experience the original Russian tubes were pretty good, though obviously not
> as good as Eimac tubes. However, if you can buy GS35Bs for the price of a
> 8877 (and that was the price in Europe last time I looked, a few years
> ago)......
>
> I've heard a few bad reports of Russian tubes recently. The original ones
> we
> got in the early 1990s were made for military use, so had to be to a certain
> standard. The new ones appear increasingly to be built to a price.
>
> I'd certainly avoid the Chinese tubes, since these are just churned out for
> export and many I have seen have been of questionalble quality.
>
> The GS35Bs sold like hot cakes in Germany when they first became known to
> European VHF/UHF amateurs via articles in Dubus etc. I remember buying a
> huge box full of them at Weinheim in about 1994-ish. They then sat around
> in my shack for several years until I realised that I'd never use them,
> then
> I took them back to the same fleamarket a couple of years later and sold
> them for five times the price. Now I wish I'd kept them, of course!
> Isn't
> that always the way? :-)
>
> But think on.....one day Eimac will go the same way as all the other
> manufacturing sector firms that disappeared due to cheaper, often inferior
> foreign competition, and then I think we'd be sorry. Famous,
> long-established names are disappearing from Britain like you wouldn't
> believe.
>
> cheers
>
> Dave G0OIL
>
>
> --- On Thu, 8/1/09, Carl <km1h@jeremy.mv.com> wrote:
> From: Carl <km1h@jeremy.mv.com>
> Subject: Re: [Amps] 3CX1500D7 quote
> To: "Tony Brock-Fisher" <barockteer@aol.com>,
> Amps@contesting.com
> Date: Thursday, 8 January, 2009, 3:30 AM
>
> Id take an 8877 over a Ruskie any day if I was doing a swap.
>
> Carl
> KM1H
>
>
> ----- Original Message -----
> From: "Tony Brock-Fisher" <barockteer@aol.com>
> To: <Amps@contesting.com>
> Sent: Wednesday, January 07, 2009 10:06 PM
> Subject: Re: [Amps] 3CX1500D7 quote
>
>
>> OK, so how about 3CX1200A7 at $1139? ('Special Price' at RF Parts)
>>
>> ...or, a GS-35B at $129 ('Buy It Now') !!
>>
>> (No wonder the AL-1200's are getting retubed Russian style!)
>>
>> -Tony, K1KP
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>>
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