Cathode follower buffer

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karatestu
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Cathode follower buffer

Post by karatestu » Thu Oct 18, 2018 10:21 am

Hello.

I am interested in learning how to build one of these with 6H6P Russian valves to stick on the end of a CDP which has a voltage out dac and output stage bypassed.

I wonder if there is any guidance that can be given as to where to learn about such circuits. I read the lampizator site which is where I got the idea but I am new to the world of tubes - I know next to bugger all about them.

Thanks for any advice (including leave well alone)

Stu
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Nick
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Re: Cathode follower buffer

Post by Nick » Thu Oct 18, 2018 10:30 am

I would start with Morgan Jones

https://www.amazon.co.uk/Valve-Amplifie ... 0750656948

Is there any DC on the output you want to put the buffer stage on?
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Greg
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Re: Cathode follower buffer

Post by Greg » Thu Oct 18, 2018 2:30 pm

Latest edition of Morgan Jones here.

https://www.amazon.co.uk/Valve-Amplifie ... b_title_bk

karatestu
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Re: Cathode follower buffer

Post by karatestu » Thu Oct 18, 2018 2:40 pm

Thanks Nick and Gregg.

When i bypassed the anologue stage i kept a pair of 10uf coupling caps (one each channel) and added 100K to ground. So i guess that will have taken care of any DC ?

I am ok with power supplies as i have done a few (SS) but the actual tube circuit is what i am a complete beginner with. Its a whole new world

I will check out that book, thanks. Stu
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pre65
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Re: Cathode follower buffer

Post by pre65 » Thu Oct 18, 2018 2:50 pm

It's a very good book, and Morgan Jones is a great fellow. He came to two of our "Owston" events on his motorcycle.

He gave me a signed copy of the latest book, only thing it's a Chinese print version. :lol:
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Ant
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Re: Cathode follower buffer

Post by Ant » Thu Oct 18, 2018 3:00 pm

Ive got a third edition around here somewhere if you want to borrow it stu

karatestu
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Re: Cathode follower buffer

Post by karatestu » Thu Oct 18, 2018 3:46 pm

He sounds like a top fella.

That's a very kind offer Ant, thank you. Is there any content in there about general electronics or is it all about valve circuits ? Thing is, I am not sure the book will be any use to me after I have done a cathode follower buffer (I take it the book covers that) as to be quite honest I have enough on with my solid state mess to keep me going a number of years.

But who knows. I may get the valve bug. If i pay postage both ways Ant, i guess that will come to quite a lot as its a big book. Maybe i should buy it . Oh i dont know, decisions decisions.

Stu
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ed
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Re: Cathode follower buffer

Post by ed » Thu Oct 18, 2018 5:09 pm

I've got an unused fourth edition which I'll let you have half price plus postage, same deal as the Doug Self. I'm pretty sure I won't be needing it.
There's nowhere you can be that isn't where you're meant to be

karatestu
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Re: Cathode follower buffer

Post by karatestu » Thu Oct 18, 2018 7:22 pm

Cheers Ed.

That was timely. Yes i will have it thanks. PM the details.

Thanks for the offer of loan Ant, much appreciated.

Stu
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ed
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Re: Cathode follower buffer

Post by ed » Mon Oct 22, 2018 7:23 pm

Stu,
I sent an email to you on Thursday 18th with details...
I've had no reply.....does this mean you didn't receive the email or that you're no longer interested....
no biggy either way
There's nowhere you can be that isn't where you're meant to be

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Re: Cathode follower buffer

Post by karatestu » Mon Oct 22, 2018 7:27 pm

Oh, sorry Ed. Have not checked email recently. Yes i would still like it.

Money will be sent tomorrow.

Many thanks, stu
:bigsmurf:

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