开云体育

Sell your 4CX250's and purchase the 3CX400's ?

Main reason for looking into the 4CX250 is I have a ton of them, like 10-12 of them, sockets and chimneys as well. My father-in-law who is also my elmer built an amp around the RF deck of a KWS-1

I cut my teeth bringing an old Johnson Thunderbolt back from the grave. (2) 4-400A tetrodes in parallel....learned a lot. Key to that whole applicaiton is the neutralization....and the fact if the

I would get the 3CX800 checked out and if good go with that. Socket is the same, filament voltage would need changed and maybe the bias. That should be it. Look at all the Alpha amps that have been

Hi Billy, I'm not an amplifier guru. I've studied & repaired a few. There's a notion in the RF amplifier camp that says "if your amplifier needs more than one tube, you need a different design." I

You can buy many decent RMS multimeters like the Brymen BM857 that is a fully safety rated and protected meter that is much cheaper than the Fluke. There are others.? There is a Multimeter comparison

Well, I was lucky enough to pick up a Henry Tempo 2006 that did not have any tubes. Yes, 3CX400A7 tubes are expensive so we were looking into modifying it to run 2 or 3 4CX250B tubes instead. I know

I located a spare Johnson #247 socket (8877). Never been soldered on. Make offer.. Dennis, w8nw [email protected]> wrote:

###? ?If I remember correctly, the 1st DTR-2000L's had this mickey mouse fan in there for cooling.? Local dealer had the 1st one in stock.? ? We all laughed when we saw the small fan...that

Ah. OK. I have gold plated ones here that I got from Mableaudio many years ago. I know that they do silver as well. I can add that the sockets have nice spring tension on the pins. That goes for the

Add says silver plated but yes very nice looking product.

Yep. Sure is. Superb quality. Gold plated contacts and all. Alek

The porcelain part of the socket are cheap at hamfest, Johnson 273 I believe. ?It gets expensive with the copper grid tabs. Sent from the all new AOL app for iOS

Is this socket a copy of the Johnson socket with the same mounting hole locations? Mike

Yes. Go for it. They are good. 73, Alek VK6APK.

Fluke 87's and 88's fall in to that class. Kim Herron W8ZV kim.herron@... 1-616-677-3706

I've heard that saying somewhat modified:? "A waist is a terrible thing to mind".? That's for? those of us who've had a couple cold 807's too many.? It's OK.? You're in good company.? Me done

The meter one uses for AC mains or any AC measurements should be a TRUE RMS reading meter to be accurate. Many of the higher quality Fluke meters (read higher priced ones) are True RMS reading AC

When I worked at a office equipment repair department, we used simple green (a common cleaner here in the mid-west), to clean the copiers and fax machines with. sprayed it on and the smoke residue ran