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Re: [Amps] 833A/GU-48 x4 Amp support

To: Máximo EA1DDO_HK1H <>
Subject: Re: [Amps] 833A/GU-48 x4 Amp support
From: Rob Atkinson <>
Date: Sun, 26 Feb 2012 14:59:34 -0600
List-post: <">>
833As are supposed to get squirrely (that is American for unstable)
above 40 m. if I am not mistaken.



2012/2/25 Máximo EA1DDO_HK1H <>:
> Hi all,
> I am not an amps expert but I am thinking to build an amplifier using 4 x 
> GU-48.
> I guess GU-48 is equivalent to 833A, not sur if all specs are same.
> This is trying to get an amp "looking beauty" and good audio quality, it is 
> not looking for extremely high power. I already have an amplifier (Acom 
> 2000A) i can use as driver.
> Something like this, but HF; 
> Gates BC-1g is an example too;
> It could be monoband amplifier for 20m, perhaps 40m too.
> I thought in GU5b and GU-81M before, but I guess GU-48 is better because 
> needs no specific blower and is triode (easier to build).
> Please, Any of you have sperience with this kind of amplifier?
> Any squematic?
> Recomendations?
> Thank you very much
> 73, Maximo - EA1DDO
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