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Dave, I don't think it's an ITAR issue...... 73 Mike N2LYM

What are the issues with Ameritron Plate Chokes? I have used an RF Parts look alike for several amplifier projects. https://www.rfparts.com/rfc3.html More chokes here

Does anyone know if Ameritron have resolved the issues with their spare parts plate chokes? I would be interested in purchasing a couple if they are not going to burn up. 73, Alek VK6APK.

And they are using this 88uh loaded plate choke in the normal place... at the anode ?

This one: [drossel.jpg] 73 Peter -----Original-Nachricht----- Betreff: Re: [ham-amplifiers] Loaded Plate chokes...again Datum: 2024-02-16T16:34:06+0100 Von: "Jim VE7RF" <jim.thom@...> An:

Where is the? 88 uh...down at the bottom ?

The version on the posted photo has 88?H. It is also used in the 20kW R&S VK20 amp with RS1082CL at 8kV 5A ,1.5-30MHz, 24/7. 73 Peter -----Original-Nachricht----- Betreff: Re: [ham-amplifiers] Loaded

##? 125 uh would work....just, on 80m.? ( 1,5 amps of RF flowing through the choke on 75m).? With the bigger 20 ga magnet wire used, it would work. 125 uh would result in 2.97 amps of RF flowing

##? How much B+ ?? ?How much plate current ?? What freqs ?? ?How much uh is their loaded plate chokes?

Ah ok. Bob W4JFA

The Rohde&Schwarz chokes are with solid rod. 73 Peter -----Original-Nachricht----- Betreff: Re: [ham-amplifiers] Loaded Plate chokes...again Datum: 2024-02-15T18:39:13+0100 Von: "Jim VE7RF"

Probably so less likely to draw an arc to the chassis , no sharp point

## My guess is to shift one of the series resonance freqs.? ?I have seen a similar trick used before, where a snug fitting copper band (3/8" to 1/2" tall)? was slid? up / down the entire length of

Looks really nice. What's the purpose of the ring around the base of the choke? I have not seen that before. ________________________________ Sent: Wednesday, February 14, 2024 6:40 PM To:

Oops, fat fingers... no, it was on 7025, 40m. Steve, K0XP

Thirty meters? 1150w? Bob W4JFA

Glen AE0Q is the expert on those amps. He's on qrz and also e-ham all the time.? He mentioned those didoes several times over the last 2 years...and also recently.

I've been in and out and read this thread with some interest. My bets are the ferrite loaded chokes will ultimately fail in service (ie. 4CX15,000, 3CX10,000 and similar) I guess the mention of ole

If they are the ones in the wattmeter bridge circuit, they're 1N5711, a fairly common Schottky diode that I've used before (and may even have some in my stash). They used to be available everywhere, I

?Hi Steve, My 8410 took static hit just before Covid started. I talked to Alpha just before they went silent and the sampling diodes are known to blow under your and my conditions. I am currently