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Old 27th June 2002, 03:37 PM   #31
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Hi Dhaen..

Have you decided about AE tranformers yet?

Regards,
Bas
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Old 27th June 2002, 06:52 PM   #32
dhaen is offline dhaen  Europe
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Hi Bas,

I'm still waiting for clarification from AE about frequency reponse and shipping.
Have been in touch with Triode Dick, who gives a glowing report on the AE product, so as soon as I get clarification I shall order from them: OPT's and driver transf..
Thanks again for the recommendation, I'll pass it on once I have first hand experience.

dhaen AKA JD
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Old 27th June 2002, 10:52 PM   #33
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Hi Jd,

My chokes should be finished next week, when I'll go to get them I'll see if I can exctract some info from him... ;-)

Regards,
Bas
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Old 27th June 2002, 11:24 PM   #34
dhaen is offline dhaen  Europe
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Thanks Bas.
Tell him I'm the one who's asked for the 845/GM70 SE OPT's and the 5K 1:1 high current Interstages.
I'll come and get them if necessary, but I'm not in Holland untill September (IBC in Amsterdam).
JD
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Old 28th June 2002, 07:57 PM   #35
dhaen is offline dhaen  Europe
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Quote:
Originally posted by steve jones
Take a look at this:

http://www.expresslighting.com/eltran24.html

An 11.6V/5A@>20khz version was posted on the TubeDIY Asylum, by Par.

I haven't tried 'em yet (probably have to choke filter the output switching noise), but hum should be non-existant with ultrasonic AC heating. And you could throttle/trim the output voltage with a dimmer.
Have you ever looked at the output waveform of one of these?
I looked at one a couple of years ago (that was causing interference). That one's waveform looked like 20KHz (ish) square wave - modulated between 0 and 100% by 100Hz.
Now I don't know whether they all use the same principle, but this one just looked like a bridge rectifier into an oscillator and a ferrite transformer.
If they are all the same, it's a no-go'er.

BTW I would love to be proved wrong on this one!
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Old 10th October 2002, 11:04 PM   #36
almarcy is offline almarcy  United States
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Default sv572-30 as driver

I am using SV572-30 as driver for Sovtek 2A3. IT is EP 3634-2.
DC filament chokes from EP as well. 277V on the plate, 18 mA. I have the negative pin grounded on 6 volt filament, giving -3V bias.

Sound is OK

Happy Ears!
Al
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Old 11th October 2002, 12:55 AM   #37
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Default Re: sv572-30 as driver

Quote:
Originally posted by almarcy
Happy Ears!
Al
Welcome to the Forum Al (aka TubeGarden) ... your wit and incisive narrative will be a great addition.

dave
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Old 11th October 2002, 01:59 AM   #38
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Default Re: Re: sv572-30 as driver

Quote:
Originally posted by planet10


Welcome to the Forum Al (aka TubeGarden) ... your wit and incisive narrative will be a great addition.

dave
Seconded!

Cheers
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Old 14th October 2002, 03:48 PM   #39
dice45 is offline dice45  Germany
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Default Re: Re: sv572-30 as driver

Quote:
Originally posted by planet10



Welcome to the Forum Al (aka TubeGarden) ... your wit and incisive narrative will be a great addition.






, Dave ..





Welcome, Al!
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Old 19th October 2002, 01:02 AM   #40
almarcy is offline almarcy  United States
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Default Got this 809 I wanna try...

I can't remember where I got it. Only one each, but, with a top cap tied to the IT, it should work

And it only requires 2.5 amps for the filament

Thanks for the warm tube welcome.

Happy Ears!
Al
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