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This is all I know on the matter Rich, however I suppose it could have happned in a car. 73 Jim SM2EKM ------------------------------------------------------------- R L Measures wrote:

Guillermo, Is the resistors in mention connected across the base and collector of each transistor? If so, someone could have been trying to add feedback to the transistors. Generally though a

Jim, Grid dissipation is measured by ohms law, grid voltage by grid current. Since the grid is at ground, you just measure the catode voltage with a scope. For calculation of efficiency you have to

I'm searching for a solid state amplifier circuit, a Henry model C130A30 (for VHF FM). The one I have seems to have been modified, I see some resistors strangely connected both at base and collector;

Wrong again Rich. I'm the moderator for Topband and I didn't boot you off...so please fabricate another story about why you voluntarily left. I thought maybe it was because you realized you didn't

The straight up and down chimney will work pretty well if the flange is sub mounted below the chassis so air has a better path up through the anode. That's the plan here for the YC-156/179. 73, Tony

That is a good point for tubes like the YC-156/179. On tubes like the planar constructed GS-35B, the grid is tied directly to the ring and can move more heat. Unfortunately, the actual construction of

connection piece of bottleneck I would the size and have to ### The grid in both a 3000/6000/YC-243 is 225 W CCS... and resembles a bird cage. The joke is.. you can use it for a dummy load for your

Peter & Jim, I started using a thick fish paper and paper tubing like that used for RF coils. You can buy it in larger diameters. I tried some with some 4CX250B's just to see how it worked and it was

All, I have the following four pieces of test equipment for sale; (1) Model 1020-B Megohm Meter by Freed Transformer 1 meg to 100k meg (2) Model 404M3 "Hypot" by Associated Research 4 kV @ 100w (3)

Hi Jim, I use heatresistant glass cylinders I get made locally and also use round teflon covers as you, thats works very well. All my blowers are made by EBM. I do not like to boost a tubes rating, I

item. by doing Seems to me like the inrush shock to the PS lasts well more than 1/180th of a second (2 crossings every full 60 Hz cycle). If their step-start uses SS zero-crossing devices, that means

Tom, If the board isn't damaged (traces burnt off), I'd just repair it. I'd think that would be the cheaper way to go. First thing I'd do is to make sure the lightning didn't short out the power

Since Eimac never made a chimney for either a 3CX-3000A7 or a 3CX-6000A7 [or the socket] several after market chimneys have appeared. I purchased the one for the 6000A7. It was solid 1/4" thick

Bill, I don't have one now, and haven't since the early 80's when I used it for a whole 9 monts if that (Novice). However, I think everyone that was on the Amps mailer knows what happened in my case

Jim, What you describe may help a little. The problem is the internal connection from the ring to the grid itself, and it's size. If it's only a piece of wire, you may not gain anything as the wire

ORIGINAL MESSAGE: wrote: ------------ REPLY FOLLOWS ------------ I'm automatically suspicious of a poster without a callsign unless they come right out and say why they don't. Most hams are proud of

Jim, See below. wrote: What happened, and you may well know this, was that when Tom first came back on the mailer, Rich and myself collared him on several topics he was really wrong on. When we done

ORIGINAL MESSAGE: <df3kv@...> wrote: ------------ REPLY FOLLOWS ------------ Slightly OT, but if you use Forte's Agent program you can switch between HTML display and plain text by pressing

Just in case some of you don't already know http://groups.yahoo.com/group/rfamplifiers/