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Agreed,? Don't start any amp project, unless you have at LEAST TWO known good tubes.? ? And don't build any amp with more than one tube....pita.? ?You will have a helluva time trying to

Regardless, with just one unknown-condition example of either, you'd be foolhardy to design anything around one... Steve, K0XP

Strange. On the link you sent on one photo it shows the 6T51 as a glass tube but on another photo it shows it as an external anode. Even on evilbay they show a 6T51 as an external anode as a FU-605.

Indeed, but sadly the only other pictures I have: Looks like this? (reading backwards through the glass) is a 6T51

I agree. The pattern on the background makes it a little confusing.

Just a thought…perhaps putting the items on a white, non-patterned background, might make ID’ing them a might easier! Just sayin’! Joe – W7RKN From: [email protected]

I've been offered this job lot from a SK sale... I recognise 3CX15k, 4CX5k, Gu81m, ITL9-1, BR1106, Vac-Vars (10-200, 25kV) any idea's for the rest? There are some kanji characters on the big glass

Like Steve said, Digi Key is the only way to order them. The original in my amp was a Magnelab. They are poorly built and according to Glenn, all of the Magnelab transformers have failed. Alpha was

Atr 50Hz 1.2A will be permitted when winding a transformer with that wire. At free air 14A will be maximum. 73 Peter, DJ7WW -----Original-Nachricht----- Betreff: Re: [ham-amplifiers] Ameritron Plate

Oopsie... I didn't notice earlier that you mentioned the 8K's choke is wound on teflon... Steve, K0XP

Yup; PTFE's a pretty good thermal insulator at low temperatures (i.e.: below its melting or burning point), especially compared to ceramic. Moreover, the ceramic can take a couple thousand degrees

Kinda hard to fit a 3CX3000-anything into a 7-inch-high desktop cabinet, even without anything connected to the top or bottom? 8-)

While on a roll, I tested both my Ameritron plate chokes.... by hooking em up to my small 0-36 vdc @ 3 amp CCS lab supply. They will take 1.5 amps CCS, and run at room ambient temp for hrs.? ?They

Don't nobody be intending to call and talk to Tim on the phone over the weekend; he'll have his ears plugged with wads of paper in anticipation of those bangs? 8-D -- See my QRZ.com page at

"?They will work for B+ applications, but have to be-derated for voltage.".... that's the question, right there. If it's rated 8kV, will it cope with 6,500V?? Because if it doesn't , 800J is going

If you are using more than one tube, you are using the wrong tube! 73, Mike Mysliwiec KF8OD

How do you match them up...even if they are good ?? ? ?2 tubes are bad enough....and 3 of em is a pita. I ran into this same problem eons ago on hb amps.? 2 x really good tubes...when tested one

I tried ordering my replacment 2K4A XFMR from Dahl/Hammond, and they told me I had to order it through DigiKey because DK was now their distributor; so I did. Initially, there was some confusion; the

Why did u have to go through digikey..and not directly with hammond / dahl ? NO hv sag at all, that's superb. IMO, whatever the B+ is? with amp keyed, and sucking normal idle current is the real no

Some oil caps were meant for energy discharge, ( like laser discharge)? and have higher internal ESR.? ?They will work for B+ applications, but have to be-derated for voltage.? ?Typ oil caps used