Testing 13E1s...

jack · Post by **jack** » Tue Jan 11, 2011 9:22 am

I've been wondering for a while about how to test/match 13E1s on a Hickok 539C...

Anyone tried measuring these on a Hickok?

Cheers

Paul Barker · Post by **Paul Barker** » Mon Apr 11, 2011 11:22 am

I doubt if it deals with the heater.

You reminded me I have two of these which Paul de Raymond LeClerk sold me with the idea of using them triode connected as output valves. he even supplied curves.

It was of course a dumb idea as nothing sounds worse than a high transconductance valve.

I might use them as series pass regs though, which they are eminently suited to.

Post by **Nick** » Mon Apr 11, 2011 11:48 am

Steve may disagree with you there Paul

Paul Barker · Post by **Paul Barker** » Mon Apr 11, 2011 12:28 pm

What has someone built a 13e1 amp before me? I bin thinking of it since 1998. But now satisfied with rationalising reasons not to.

I bet he won't build that GM100 I haven't yet got round to first though!

Dave the bass · Post by **Dave the bass** » Mon Apr 11, 2011 12:51 pm

Welcome back Mr B

DTB

Paul Barker · Post by **Paul Barker** » Mon Apr 11, 2011 12:57 pm

Well I have nothing working and haven't even found my soldering iron (so I bought another on ebay and waiting for it)

So I am here in spirit not in body.

Cressy Snr · Post by **Cressy Snr** » Mon Apr 11, 2011 1:40 pm

Paul Barker wrote:I doubt if it deals with the heater.

You reminded me I have two of these which Paul de Raymond LeClerk sold me with the idea of using them triode connected as output valves. he even supplied curves.

It was of course a dumb idea as nothing sounds worse than a high transconductance valve.

I might use them as series pass regs though, which they are eminently suited to.

Nice to hear from you again Paul
Ere!

I have a 13E1 in tetrode mode with OPT secondary to grid feedback, which is driven by a C3g in pentode mode with an unbypassed cathode resistor.

Two Hi-gm valves and feedback an all. No triodes and it sounds rather good.

I'm heavily into single-ended pentodes these days.

Steve

Post by **Nick** » Mon Apr 11, 2011 2:02 pm

Cool, lets form a club, to join you have to have succesfully not built a GM100 amp

Dave the bass · Post by **Dave the bass** » Mon Apr 11, 2011 2:14 pm

Whahey! I'm in.

Can I have a Tee shirt and badge please?

Ta.

DTB

shane · Post by **shane** » Mon Apr 11, 2011 2:22 pm

I didn't build one, but it didn't work. Damn.

Cressy Snr · Post by **Cressy Snr** » Mon Apr 11, 2011 2:50 pm

Doctor Who nicked mine before I could finish it.
Said he needed to help out Flash Gordon and could he borrow it pretty please?
Never saw it again.

Does that mean I'm in?

pre65 · Post by **pre65** » Mon Apr 11, 2011 4:19 pm

Nick wrote:Cool, lets form a club, to join you have to have succesfully not built a GM100 amp

I'm in as well.

Paul Barker · Post by **Paul Barker** » Mon Apr 11, 2011 5:03 pm

SteveTheShadow wrote:
Nice to hear from you again Paul
Ere!

I have a 13E1 in tetrode mode with OPT secondary to grid feedback, which is driven by a C3g in pentode mode with an unbypassed cathode resistor.

Two Hi-gm valves and feedback an all. No triodes and it sounds rather good.

I'm heavily into single-ended pentodes these days.

Steve

Ah well that is a different kettle of fish. I bet it sounds good.

there are a lot of interesting pentodes also.

That direct heated pentode/beam tet which l;ooks like a px25 would be fun I bought 4 or perhaps 6 once but never got round to anything. then there is the gm71 was it? or gk71? I have some, and then the 813 of course.

Loads of possibilities.

I moved on from the 813 triode connected because I prefer the silky sound of the 211 compared to it and also prefer the 211 to the gm70.

But the pentode sound with feed back is a whole lot different. I bet it is a lot better as originally designed.

Paul Barker · Post by **Paul Barker** » Mon Apr 11, 2011 5:06 pm

pre65 wrote:
Nick wrote:Cool, lets form a club, to join you have to have succesfully not built a GM100 amp
I'm in as well.

I would like to invite you to my club but you have to own the GM100's that you haven't got round to building the amp for.

I could sell you mine but then I couldn't be in the club and you would be the only member instead of me.

pre65 · Post by **pre65** » Mon Apr 11, 2011 5:10 pm

Could I be an associate member as I did think about it once ?

audio-talk

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