Regarding glass windows, I've seen them in pictures, and always wanted an
amp with one, but was always concerned about RF leakage and the possibility
of long term exposure to VHF harmonics, particularly when I got up close to
the window to admire the tubes.
Are there practical techniques to safeguard against these issues in HF amps?
I like the way a 4-1000a looks too..
(The emphasis here is on safe nostalgia, not contemporary design
techniques.)
Regards to all
Ed
----- Original Message -----
From: "Mike McCarthy, W1NR" <w1nr@eecorp.com>
To: "P. Coppin" <copa054@cira.it>; <Amps@contesting.com>
Sent: Saturday, February 28, 2004 9:26 AM
Subject: RE: [Amps] 2 x 8877
> The Alpha SX had issues on 10M because of the capacitance of the two
> tubes. Also, 2x8877 is more expensive than 3x3cx800. With the 3cx800,
> the plate voltage is lower, required capacitance is lower, voltage
> ratings of tank components is lower translating into a more cost
> effective design.
>
> Still, nothing impresses me more, at least visually, than a pair of
> 4-1000's built into a cabinet with windows...
>
> Mike, W1NR
>
>
> -----Original Message-----
> From: amps-bounces@contesting.com [mailto:amps-bounces@contesting.com]On
> Behalf Of P. Coppin
> Sent: Friday, February 27, 2004 8:29 AM
> To: Amps@contesting.com
> Subject: [Amps] 2 x 8877
>
>
>
> First of all, sorry for my poor english.
>
> I would like to know the reason why the amps manifacturers build linear
> amps
> using three 3cx800a7, 2 3cx1200a7, one 3cx3000a7 and ruskies but no one
> build a linear amplifire with 2 3cx1500a7 (8877) such as the Alpha sx.
> What problems they could have ?
>
> 73
> Paul i8ixo
>
>
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