km1h@juno.com wrote:
>
> $190 for a guaranteed full output pull is expensive ?? If you really
> intend to run at low voltage and 1200-1500W the tube may outlive you.
I haven't been able to find these $190 guaranteed pulls! I sent an email to
Radio Recyclers, and checked out some other leads. If you can tell me who is
selling these I will look into it.
> >The 3CX800A7 and 3CX1200A7 are expensive and not instant-on.
>
> OH ! You're only 50% correct.
OK, I see the 1200A7 is a filament-type. But it IS expensive.
> Also
> >they have
> >somewhat low grid dissipation ratings and I'm afraid of damaging
> >them.
>
> OH, again.
OK again, I was looking at the 800 data sheet, I see the 1200A7 has a 50 watt
grid dissipation. But it IS expensive.
> Yeah, real marginal, you should only expect about 1800W with a 3400V
> supply. The 8877 will do it at 2300V. Do the math on the PS and RF
> components at both voltages.
I meant the drive was marginal (100 watts) for the pair of 3-500z's. But I
agree already, the 8877 is a better tube, which is why new ones go for $650+.
I like the idea of an inexpensive PS. I want to know where to get a guaranteed
8877 for $190.
> BTW, that DTR-2000L is now running 4KV on 6M and really does some serious
> RF !
> Still no need for a parasitic suppressor.
You'll notice that I didn't mention parasitic suppressors in my original post.
Thanks for the comments.
73,
Vic, K2VCO
Fresno CA
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