[Amps] 3CX800A7 low grid current version?

[Steve London]

This sounds like the same tube that Alpha was selling a few years ago. It was 
also touted as "low grid current". The specs are exactly the same as the 
standard tube, as far as I could tell. Alpha specifically did not recommend 
using it in the Alpha 87.

The designation on the Alpha tube is:
VTU-3CX800A7LG "Alpha Tubes" 1450

BTW, in my converted 76PA, I do NOT find the pair of 3CX800A7LG's particularly 
easy to drive with the Alpha broadband input transformer. It typically takes 
60-70 watts for 1500 watts output, depending on the band.

73,
Steve, N2IC

On 03/16/2019 02:33 PM, Floyd Sense wrote:
> I see that RF Parts carries a "low grid current version" of the 3CX800A7 tube, 
> but haven't been able to locate any technical info on the tube.  I assume that 
> this version of the tube might result in lower grid current than the standard 
> version, at a given power level with all other things being equal.  Can someone 
> verify that and are there any other considerations when using such tubes in my 
> Alpha 89 amp?
> 
> 73, K8AC
> 
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