Hi Ian & all..
May also be worth mentioning that (I think) the original Svetlana-built Russian
military tube was the 4CX1600A, which is similar but not identical to the newer
4CX1600B. My impression is that the "B" version may have been derived
specifically for commercial export sales - has a bigger and more efficient air
cooler, greater power rating, and specific applications data for SSB. How much
the increased ratings are due to the cooler, possible internal changes (which I
doubt), or a less conservative ratings philosophy for ham/export applications
is unclear.
Can anyone (Ian?) confirm, clarify, correct or add to the above?
Incidentally, Alpha/Power designed a new industrial rf amp around 1600Bs about
2 years ago but switched to more expensive Eimac tubes because Svetlana
couldn't give us a convincing forecast of adequate delivery volume, at least at
that time.
73,
Dick W0ID
> -----Original Message-----
From: Ian White, G3SEK [SMTP:G3SEK@ifwtech.demon.co.uk]
Sent: Sunday, November 28, 1999 2:37 PM
To: amps@contesting.com
Subject: Re: [AMPS] 4CX1600B Amplifier in new handbook
...(snip)....
>
>
Warning - it's not the same tube!
> The 4CX1600B is made by Svetlana in St Petersburg and has a pin base.
[> The GS23b is made by a different company in the Ukraine and is a totally
different tube. ...snip...
> Part of the confusion is that Svetlana at one time were going to market
the GS23b as the "4CX1600U", and even published a data sheet, but then
pulled out because of supply difficulties.
> 73 from Ian G3SEK Editor, 'The VHF/UHF DX Book'
'In Practice' columnist for RadCom (RSGB)
http://www.ifwtech.demon.co.uk/g3sek
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