----- Original Message -----
From: "Colin Lamb" <k7fm@teleport.com>
To: "Carl" <km1h@jeremy.mv.com>; "BEHIELS JEAN-PIERRE" <ON4AEF@base.be>;
<amps@contesting.com>
Sent: Tuesday, January 26, 2010 5:20 PM
Subject: Re: [Amps] HELP Modifications for a Kenwood TL922
> "A. A new 3-500Z costs around $150
> B. The grids are not grounded in a TL-922.
> C. I dont think there is top clearance for a 4-400"
>
> The ham raising the question was not in the US and tubes may be more
> difficult and expensive there. The fact that the writer was willing to
> put in a new filament transformer to run one tube rather than two implied
> that purchasing a replacement 3-500Z tube was not an option. I do not
> know his finances, but I have been in countries where $150 is a years
> income for some.
Belgium is not a 3rd world pit! Distributors are in Europe or one could be
shipped from the USA for about $15.
>
> No, the grids are not grounded directly, but pins 2,3 and 4 can be
> strapped together and will work.
As long as it is realized; its not a direct swap otherwise.
>
> I thought the 4-400 is the same height as the 3-500Z. I have substituted
> directly in the SB-220 with no problem.
About .3" taller than the current 3-500. Almost .5" over the 2 earlier
versions. I dont know the TL-922 clearance.
Carl
KM1H
>
> Colin K7FM
>
_______________________________________________
Amps mailing list
Amps@contesting.com
http://lists.contesting.com/mailman/listinfo/amps
|