PL36 Sweep Tube

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Cressy Snr
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PL36 Sweep Tube

Post by Cressy Snr » Sun Sep 23, 2018 3:56 pm

Now then!
I found a few NIB Mazda PL36 in the miserable couple of boxes of what's left of my valve collection. I found them in a box of rectifiers.
IIRC, these B&W TV line output valves, are indescribably awful as audio pentodes, but as triodes, they are incredibly linear.

Has anyone ever in the dim and distant past, built anything with these?
Why, for example, should a group of simple, stable compounds of carbon, hydrogen, oxygen and nitrogen struggle for billions of years to organise themselves into a professor of chemistry? What's the motive? (Robert M Pirsig)

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Ami
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Re: PL36 Sweep Tube

Post by Ami » Sat Sep 29, 2018 9:55 pm

Hi there.

Dad built a self split class A P/P with two of those. It ran on quite low HT. He used this circuit as inspiration http://www.b-kainka.de/roehren/Schaltung4.gif full article http://www.b-kainka.de/roehren/gegentakt.htm. (in German)

I have Dad's notebook with details of his version in but no way to scan it at the mo!

He built it as part of a guitar amp for Mum expecting some interesting distortion but was surprised how clean it sounded.

Luv, Ami.

Cressy Snr
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Posts: 8362
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Re: PL36 Sweep Tube

Post by Cressy Snr » Tue Oct 02, 2018 11:35 am

Ami wrote:
Sat Sep 29, 2018 9:55 pm
Hi there.

Dad built a self split class A P/P with two of those. It ran on quite low HT. He used this circuit as inspiration http://www.b-kainka.de/roehren/Schaltung4.gif full article http://www.b-kainka.de/roehren/gegentakt.htm. (in German)

I have Dad's notebook with details of his version in but no way to scan it at the mo!

He built it as part of a guitar amp for Mum expecting some interesting distortion but was surprised how clean it sounded.

Luv, Ami.
Thanks Ami. :)
Why, for example, should a group of simple, stable compounds of carbon, hydrogen, oxygen and nitrogen struggle for billions of years to organise themselves into a professor of chemistry? What's the motive? (Robert M Pirsig)

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