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Old 17th June 2014, 09:08 AM   #1
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Default Mullard 3-3 PCB

Anyone know if there is a PCB available for the Mullard 3-3 or even better for a stereo pair?

Cheers

Ian
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Old 18th June 2014, 06:36 AM   #2
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Ian.
I'm sure you have this original build article:
Mullard 3-3. Three Watt Amplifier

It really is'nt worth doing a PCB for it, so I strongly doubt that anyone has.

Cheers,
Ian
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Old 18th June 2014, 09:10 AM   #3
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Ian,

Yes, I have the original article. I did Google for a PCB and found a homebrew one but no others. I want to build this into a 19 inch rack enclosure rather than a regular chassis. I was thinking of a pair on a single PCB with an external SS PSU. Wiring the heaters of both stages in series would allow its heaters be run from a 12V dc 1 amp dc supply.

I also read somewhere that there was a PCB version at some time so I would be interested in seeing the layout.

Cheers

Ian
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Old 19th June 2014, 12:02 AM   #4
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Check out MabelAudio they may have something or something which can be made to work. It would not be a Mullard 3 + 3 (EF86 + EL84).

They certainly have a board for something similar but with EL34 outputs which could also be made to work with 6V6.

Mableaudio is a company who can build tube amplifier and we also supply all the components for tube amplifier.Such as tubes,tubes sockets,switches,capacitors,resistors,PCB,chassis to get you started_MABLE AUDIO

If you are prepared to go push pull (but still Class A)then there is this:
Untitled
6005 are 6AQ5'ish or 6V6 in small base.

THis list is now dated but may be worth browsing:
World Tube Audio Portal - Category Tube Amplifier Kits


Cheers,
Ian
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Old 19th June 2014, 10:48 AM   #5
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Default Mullard 3-3 PCB

Is the homebrew version the one on UKVRR? The 3-3 is a simple design, as simple as it gets really; why not make your own from copper clad/ If your a member of UKVRR you could PM MM ( the OP of the 3-3 PCB thread) and I,m sure he,ll be happy to share his design.

If not if you can knock up a design on CAD or something similar, there are quite a few companies that will knock up a few PCB's for you.

Personally, I make my own simple PCB,s out of copper clad board using a Dremmel to remove the copper. If your not good/unable to use your hands PM me and I'll make one for you if you sort the design out.

Good luck,Andy.
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Old 19th June 2014, 11:32 AM   #6
Cookj is offline Cookj  Belgium
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Pictures of layout in first post of this link:
PCB based Mullard 3-3 - UK Vintage Radio Repair and Restoration Discussion Forum

Cheers

John
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Old 20th June 2014, 06:17 PM   #7
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Quote:
Originally Posted by Dr Wobble View Post
Is the homebrew version the one on UKVRR? The 3-3 is a simple design, as simple as it gets really; why not make your own from copper clad/ If your a member of UKVRR you could PM MM ( the OP of the 3-3 PCB thread) and I,m sure he,ll be happy to share his design.

If not if you can knock up a design on CAD or something similar, there are quite a few companies that will knock up a few PCB's for you.

Personally, I make my own simple PCB,s out of copper clad board using a Dremmel to remove the copper. If your not good/unable to use your hands PM me and I'll make one for you if you sort the design out.

Good luck,Andy.
Hi Andy,

I am quite happy to design my own PCB if necessary. I already do a lot of tube PCB designs. I wanted to avoid the "I'm going to design a Mullard 3-3 PCB layout" post only to be bombarded with a host of "it's already been done" posts.

Cheers

Ian
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Old 20th June 2014, 06:18 PM   #8
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Quote:
Originally Posted by Cookj View Post
Pictures of layout in first post of this link:
PCB based Mullard 3-3 - UK Vintage Radio Repair and Restoration Discussion Forum

Cheers

John
Hi John,

When I said in my first post that my searches had only turned up one PCB, that was the one!

Cheers

Ian
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Old 20th June 2014, 06:20 PM   #9
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Quote:
Originally Posted by gingertube View Post
This list is now dated but may be worth browsing:
World Tube Audio Portal - Category Tube Amplifier Kits


Cheers,
Ian
Hi Ian,

Thanks for the link. Although some of the links are broken that is a very useful resource.

Cheers

Ian
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Old 20th June 2014, 08:18 PM   #10
M Gregg is offline M Gregg  United Kingdom
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Ian,

I am just curious as to why you picked the 3-3 to build..
Is it the EF86 that has interested you?


Regards
M. Gregg
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Last edited by M Gregg; 20th June 2014 at 08:30 PM.
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