[Amps] Henry filament problem solved!

[Martin Sole]

I have 2 Henry 2K Classic amplifiers and in both of them the tube 
filaments are most certainly in parallel. A Dark tube, noted on both, 
was caused by slight loosening of the filament grips in the sockets. The 
tremendous heat cycling coupled with the need for very low R at this 
point makes it a clear weak spot I think.

Martin, HS0ZED


On 30/06/2019 02:53, Ted Rachwal wrote:
> Thanks to all who offered advice on fixing the loss of filament to one 
> of the 3-500Z tubes in the Henry 2K amp.
>
> I put the tubes back in and started to check filament voltage 1st and 
> when I stuck the probe into pin #1 on V1, the tube came on. Pulled the 
> tubes again and cleaned all the pin holes and clamps then I gently 
> squeezed the clamps a little to tighten them some. Put the tubes back 
> in and we are working back at full output.
>
> Thanks for all the advice, I have learned quite a bit in last couple 
> days by going thru the schematics looking for different circuits in 
> the amp, you were all a great help!
>
> 73,
>
> Ted K8AQM
>
>
>
> ---
> This email has been checked for viruses by AVG.
> https://www.avg.com
> _______________________________________________
> Amps mailing list
> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps