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Thanks Hal. That would be an interesting exercise. I use my nano vna all the time too but I don't think I'll bother in this case, as it seems to work fine with the cap in place. I'll let sleeping dogs

That 47 pf cap basically would add 47pf to the total of the entire value of the load cap. ?Usually load padding is switched in and out rather than hung on there forever. ?That’s a relatively small

{SNIP} I have a question regarding what appears to be an added 47pF/3kV blue ceramic capacitor in the output tank circuit. It goes from the output contact of the bandswitch to ground, as seen below.

Alek, FWIW, mine has it as well. Attached picture is my 922. That extra circuit board you see is the "Kessler" electronic bias board. 73, Bob W4JFA [email protected]> wrote:

G'day all. I am currently working on a couple of TL-922 amplifiers and I have a question regarding what appears to be an added 47pF/3kV blue ceramic capacitor in the output tank circuit. It goes from

Very impressive workmanship! Thanks for sharing this accomplishment. Mike Peace mike.peace@...

{SNIP} ... pix of the 10 kw 6M amp...using the new Pentalab 3CX-6000A7 tube... {SNIP} Yuss! Here's what chassismongery is all about. No greezy kid stuff, no tell-tale fingerprints. And plenty of P/Sup

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.

We build this kind of thing out of junk we have laying around. It's out there is you ask and look for it. C

Dear Clark, Thanks for posting the reply to a previous post regarding the power supplies for plate modulation. The schematic you included shows a grid reactor with a value of 20 henries. Wow. In this

It is best to run a separate Power supply for the modulators.? You can run the RF deck and Modulator deck off the same supply of course.? The reason is that you can run higher voltage on the

Gents, For those experimenting with Plate Modulation I need to ask about the power supplies and the modulation transformer(s). Especially with 3-400's as modulators. The filament supply must be stout,

Recently a friend and I have been playing around with plate modulating GG Triodes in class C.? ?Just for fun.? ?My rig is a 450TH modulated by a pair of 100TH tubes.? His rig is a single 3-400Z

Ok Jim. You'll be happy. Let us know how you do. Bob W4JFA

Hi Bob, Lou sent me a photo, and I am ordering a meter from him. It looks just great. No need for you to go to the trouble of taking a picture. Jim McPhee Placitas, NM W5ABA

Hi Bob, Thanks for the offer of a picture. I would like to see one. Would you post it here or send it to me? My email is jmcphee at comcast dot net. Jim McPhee Placitas, NM W5ABA

Hello Lou, If I’m not mistaken you were active on the Yahoo TL-922 list a few years ago, and we exchanged some messages. I looked for your email address in my Outlook client but couldn't find it.

Jim, I have one of Lou's meters in my 922. You almost can't tell it's replaced. Let me know if u want a pic. Bob W4JFA [email protected]> wrote:

Plate current meters are not available new. The only hope of getting one is to find someone parting out an amp and selling off parts. ?The only other alternative I know of is to purchase a meter from

A recent event of unknown cause or origin has totaled the existing plate current meter. I have replaced R5, R6, and R7 (R6 was toast). Diodes D2 and D7 are on there way and will be replaced upon