Interesting Burman Project Incoming.

CraigGa · Post by **CraigGa** » Tue Dec 14, 2021 8:05 pm

I'm sure we've all been there, seeing something on Ebay and buying it without thinking it through properly but...

I just bought an as new Burman Pro 502 chassis but it's no ordinary Burman chassis.

For those that don't know, Burman hand made amps in Newcastle England in the 70's and 80s, I have a Pro 502 combo that I bought new in 1978 which I recently restored with the help of this forum.

Anyway the company went under some time in the mid 80's but they planned a relaunch (I think by Greg Burman's son) in the 2000's and this chassis is one built for the relaunch that never happened!

I can see a few differences between the two but I'll know more when it arrives here.
One thing for sure is that it has EL34's in place of the original's KT77, is there much difference in operation between them or is it just rebiasing? most of the Burmans I see on Ebay have had the KT77s replaced with EL34s

Craig

Stevem · Post by **Stevem** » Tue Dec 14, 2021 11:38 pm

Yes EL34s are plenty close enough to work for kt77s but they should be biased a little cooler since a 34 is rated at 3 watts less, 25 vs 28.

CraigGa · Post by **CraigGa** » Wed Dec 15, 2021 9:19 am

Thanks Steve.
At £109 for a pair of KT77s it might stay an EL34 amp but it's good to know they're pretty much a drop in.

Craig

chief mushroom cloud · Thu Dec 16, 2021 6:09 pm

Nice!

CraigGa · Post by **CraigGa** » Thu Dec 16, 2021 9:22 pm

It arrived today, clean as a whistle.

Craig

Post by **Colossal** » Thu Dec 16, 2021 10:54 pm

Wow, nice amp.

CraigGa · Post by **CraigGa** » Thu Dec 16, 2021 11:05 pm

Colossal wrote: ↑Thu Dec 16, 2021 10:54 pm Wow, nice amp.

Thanks, it's probably 20 years old but looks brand new.

I'll post back when I've powered it up.

Craig

Post by **Colossal** » Fri Dec 17, 2021 12:41 am

Reminds me of Cornford amps

thetragichero · Post by **thetragichero** » Fri Dec 17, 2021 3:59 pm

only thing i'm not really a fan of is the tube sockets but besides that looks killer and easy to work on! i dig the little turret boards for the transformers; makes for quick understanding of what is what

2tone · Post by **2tone** » Fri Dec 17, 2021 8:31 pm

I have a 100 watt Burman that came with KT77's, but the power transformer went out, and I wondered if anyone knew if a Partridge PT is available anywhere or it has to be rewound?

imjonwain · Post by **imjonwain** » Sat Dec 18, 2021 4:24 am

cool looking amp! Nice construction inside with room to work too.

CraigGa · Post by **CraigGa** » Sat Dec 18, 2021 12:57 pm

2tone wrote: ↑Fri Dec 17, 2021 8:31 pm I have a 100 watt Burman that came with KT77's, but the power transformer went out, and I wondered if anyone knew if a Partridge PT is available anywhere or it has to be rewound?

I seem to remember that some of these have been repaired with transformers designed for Hiwatts, I don't know the details though sorry.

The Amp Garage

Interesting Burman Project Incoming.

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