[Amps] 17 x pix of the 10 kw 6M amp...using the new Pentalab 3CX-6000A7 tube

[Steve Bookout]

Jim,

How is the 'next amp' going to be used?

Steve, NR4M

On 8/25/2023 9:19 AM, jim.thom jim.thom at telus.net wrote:
> 17 x pix of the 10 kw 6M amp...using the new Pentalab 3CX-6000A7 tube. If
> you want to see pix of both top + bottom of the RF deck, + pix of the HV
> supply, here is the link.
> https://amprepairguy.com/10kw-6-meter-custom-pa-3cx6000a7...
> <https://amprepairguy.com/10kw-6-meter-custom-pa-3cx6000a7.html?fbclid=IwAR1rqa0I-Op9lEPcKJt2UzdmTBJxTGZa9G72wrgr6HSQcQXsD3sL2_LnWMo>
> The next amp is the 80-15m band switched unit, using the same 3CX-6000A7
> tube. I have finalized the design for the RF deck. Components of course are
> a lot bigger. 1/2" silver plated tubing used for the 20-17-15m coil (and
> also the L coil before the main PI-net). The 80-40-30 coil will be hand
> wound, using 3/8" tubing.
> 500 pf ceramic vacuum tune cap, and a 3000 pf vacuum load cap. Same setup
> for the TR relays. RJ1A for the cutoff bias, and a 2nd RJ1A for the input.
> 2 x paralleled RJ2B's for the output. 7-16 DIN connector for the output. 4
> x 200pf HT-57 plate blockers used. I have also finalized the design for the
> 160-80-40-20-17-15m version. It uses a 4000 pf vac load cap, and one extra
> coil.... for 160m (silver plated 1/4" tubing used). 8-9 x 200pf HT-57 plate
> blockers used.
> The HV supply will use a lot more B+ (7500 vdc)...and will use 2 x
> identical plate xfmrs in parallel. Both designs employ a bandswitched PI
> tuned input. (C1 + C2 are padded on 160m) Stay tuned.
>
> Jim VE7RF
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