[Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke

[Gary Schafer]

Have you figured how many joules of energy the amp will supply with a 
plate circuit short compared to how much energy the gas tube will handle?

73
Gary  K4FMX

Paul Hewitt wrote:
> Hi Gerald
> Eimac recommends the Siemens B1-C145 for the 3CPX5000.  I believe Phil, K5PC, has looked for this and found it obsolete, not sure what he crossed it to.   I'm using a Bourns 2035-09-B, (90v) for the lower drive amps and the 150 volt gaps for the two tube amps.  Mouser stocks a wide selection of the Bourns discharge tubes, Mouser#  652-2035-09-B, (90 volt 20KA.)  I believe I measured the internal capacitance of these gaps at 1-2pf.
> 
> 73, Paul
> 
> PAUL HEWITT
> WD7S PRODUCTIONS
> QRO HOMEBREW COMPONENTS
> http://home.earthlink.net/~wd7s
> 
> 
> 
>   ----- Original Message ----- 
>   From: TexasRF at aol.com 
>   To: wd7s at earthlink.net ; amps at contesting.com 
>   Sent: Saturday, March 05, 2005 8:15 AM
>   Subject: Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke
> 
> 
>   Hi Paul, please pass along the information about where to purchase these gas discharge devices and to get more info about them.
> 
>   Perhaps this is what we need for our mid size tetrodes used at 432 and 1296MHz for screen grid to anode flashover protection.
> 
>   Tnx/73,
>   Gerald K5GW
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