[Central-Electronics] CE 200V - Tubes

Tue, 17 Feb 2004 20:18:18 -0500

Hello George--
Gross generalizations here, but the Russian tubes are vastly superior to the
Chinese variety. I expect that in a few years, the opposite will be true, as
the Chinese clean up their quality control problems.
You are right to mention that using a 100-V or 200-V with 6550s is serious
overkill, when driving the 600-L.
I haven't had a chance to experiment yet, but the idea of going to a less
powerful (and less expensive) tube, such as the 6L6 / 5881, or even the 6V6,
has occured to me. This may result in identical overall operation with
vastly lower tube cost. Has anyone on the list tried this? I have
successfully employed this technique with audio power amplifiers.
Chuck N1LNH
----- Original Message -----
From: "George Maier" <[email protected]>
To: "'Radio Central Electronics'" <[email protected]>
Sent: Tuesday, February 17, 2004 9:47 AM
Subject: RE: [Central-Electronics] CE 200V - Tubes


> Thanks Chuck - your advice is both sage and sensible, and I'm sure that we
> all agree that Tung-Sol is the best.
>
> I guess my question deals more with how the others (Sovtek, Svetlana,
Valve
> Art, Winged C, etc) actually perform, and what is different about them.
>
> If the RF o/p is not as high, but the linearity is the same, some people
> might not care.  For example, when driving a 600L, a 100V/200V is total
> overkill, and the exciter power control is at or close to minimum anyway.
> Also, if you run barefoot and get 80W instead of 100W, that's less than
1.0
> dB, and no one would ever notice.  In my case, I typically drive a
3-1000Z,
> which takes most of what the 200V can put out, but there's still some room
> to spare.
>
> If on the other hand, the other-than-Tung-Sol tubes do not exhibit good
> linearity, or don't last very long, that's quite another matter.
>
> Any comments (from anyone) will be appreciated.
>
> 73,  George - K1GXT
>
>
>
>
>
> -----Original Message-----
> From: Chuck Ochs [mailto:[email protected]]
> Sent: Tuesday, February 17, 2004 1:49 AM
> To: [email protected]; 'Bill Marx'; 'Radio Central Electronics'
> Subject: Re: [Central-Electronics] CE 200V
>
> 6550 tubes--
> The best ones ever made were the Tung-Sol variety. Highly sought after for
> audio amplifiers also. The currently available types pale in comparison.
> Chuck N1LNH
> ----- Original Message -----
> From: "George Maier" <[email protected]>
> To: "'Bill Marx'" <[email protected]>; "'Radio Central Electronics'"
> <[email protected]>
> Sent: Monday, February 16, 2004 9:04 PM
> Subject: RE: [Central-Electronics] CE 200V
>
>
> > Looks like mine did when I first got it.
> > Speaking of the "V", has anyone on the list taken the time to evaluate
the
> > various types of 6550's that are around these days?  Prices are all over
> the
> > place, but I've been wondering what's good and what's not.
> > Thanks & best to all,
> > George - K1GXT
> >  *** CE is all you need - period !!! ***
> >
> >
> > -----Original Message-----
> > From: [email protected]
> > [mailto:[email protected]] On Behalf Of Bill
Marx
> > Sent: Monday, February 16, 2004 5:31 PM
> > To: Radio Central Electronics
> > Subject: [Central-Electronics] CE 200V
> >
> > This list has been quiet of late. Here is a 200V to get everyone
excited.
> >
>
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=4675&item=3078714415
> >
> > -Bill W2CQ
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> >
> >
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