• WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
    Building, troubleshooting and testing of these amplifiers should only be
    performed by someone who is thoroughly familiar with
    the safety precautions around high voltages.

Project choice for KT88

Hi JdeV,

Here are a couple more for your consideration:
http://www.amplimo.nl/download/pubs/hqpp-50/hqpp50.pdf

The Power Supply may be found here:
http://www.amplimo.nl/download/pubs/hqpp-50/hqpp50ps.pdf

Then there's the Claus Byrith amplifier discussed here:
http://www.lundahl.se/claus_b.html

This last amplifier is based on the Mullard 5-20 (uses EL34 PP) and gives excellent results (I have built five of them!)

I also wish to construct something else now and I am looking favourably at the HQPP50W design above.

Hammond Output Transformers are locally available for all the above (JHB & CT) while the Mains Transformers can be manufactured by a Company such as Peter Souris.

Regards

-Eric
 

JDeV

Member
2002-10-19 7:51 pm
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Family_Dog said:

Then there's the Claus Byrith amplifier discussed here:
http://www.lundahl.se/claus_b.html

This last amplifier is based on the Mullard 5-20 (uses EL34 PP) and gives excellent results (I have built five of them!)

Regards

-Eric

I know that one, build 2 myself about 3 years ago. Bussy at the moment to fit new PSU and high grade components to it. Got the urge to build something with the KT88, like the appearance of the valve :cool:

Remember this? ;)

Old post - JDeV
 
JDeV said:
Hi george,
Which amp circuit is this and where can I get component values, trafo specs etc?


The amps long gone and i don't have the values for it any longer but some of the brainiacs here may be able to calculate out the parts guys like SY and alike if their feeling bored. the tranies were one of the Hamond ones a 150 watter.
This amp put out somthing like 180watt in ultralinier, with a switch i had it in triode mode still up around 80.

Cheers George
 
JDeV said:


I know that one, build 2 myself about 3 years ago. Bussy at the moment to fit new PSU and high grade components to it. Got the urge to build something with the KT88, like the appearance of the valve :cool:

Remember this? ;)

Old post - JDeV


Yep... that was a whikle ago.... have you looked at the other site I referred you to - the one with the HQ50PP amplifier? That uses KT88...

-Eric