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John Lindsey Hood amp

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John Lindsey Hood amp

Post by kp93300 on Sun Dec 11, 2011 3:13 pm

I recently build a kit based on the 1969 version and is very surprised by the sound quality.

The amp is very cheap , easy to build and very good !

It has a very unique sound and hope more will build to try .

More info can be obtained from here

http://www.tcaas.btinternet.co.uk/index-1.htm

Has anyone here any experience with the amp and the newer versions ?


regards

kp93300

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Re: John Lindsey Hood amp

Post by kp93300 on Sun Dec 11, 2011 3:16 pm


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Re: John Lindsey Hood amp

Post by fizi on Sun Dec 11, 2011 3:57 pm

kp93300,

Hahahaha Very Happy u have a new gang here.....

I own 1 of his amplifier, mine is Linsley hood powertran 75

I just send to change from DIN to RCA connector and wanna do some touch up on the wood part.... my version is totally from the designer not a diy kit....once it ready i will post it here ( eager to match it with my harbeth )

Cool
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Re: John Lindsey Hood amp

Post by Wikin on Sun Dec 11, 2011 4:19 pm

How is the sound compared to a good single ended tube amp?

cheers
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Re: John Lindsey Hood amp

Post by kp93300 on Sun Dec 11, 2011 6:34 pm

Hi
I didnot own any tube amp but i prefer it over Aleph J and F5 that has more elaborate power supply. I use a simple cap multiplier from Elliot sound for the Lindsey amp. It has enough gain for the Twisted Pear Buffalo 2 and i didnot use any pre .

I am surprised by the detail it dig out from even none audiophile disc.
I enjoy orchestral music and the experience make me recall my recent attendance to the MPO in Kuching
The decay from piano notes is very realistic . Each note is very distinct and and the space between 2 notes is very easy to discern.

I notice that I nod my head and tap my feet much more with this amp.

I hope more diyers with sensitive speakers will build it to try.

The parts are very ordinary and cheap.

I hope to try newer versions in the near future.

BTW Siliconray at diy audio is offering free pcb for the newer version of the amp that has no cap in the signal path

cheers

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Re: John Lindsey Hood amp

Post by Wikin on Sun Dec 11, 2011 8:53 pm

I see, thanks man.

That reminds me, I have an original Pass Zen pcb that's just screaming for me to populate it Smile

Have you heard the Zen amplifier before?



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Re: John Lindsey Hood amp

Post by kp93300 on Mon Dec 12, 2011 7:46 am

Hi Wikin,
i have no encounter with the Zen.
Simple circuits have its charm .

Hi Fizi
can you post some pictures of your amp ? How do you describe the sound ?

thanks



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Re: John Lindsey Hood amp

Post by zyker on Mon Dec 12, 2011 9:53 am

What's the transformer voltage you use for this JLH?

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Re: John Lindsey Hood amp

Post by fizi on Mon Dec 12, 2011 7:51 pm

some short before sending to garage....







will update latest photo once it ready...
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Re: John Lindsey Hood amp

Post by kp93300 on Mon Dec 12, 2011 10:27 pm

zyker wrote:What's the transformer voltage you use for this JLH?

I use 0 22 V ac and 250 va transformer

After rectification and the cap multiplier , it is about 24 V dc on load.

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Re: John Lindsey Hood amp

Post by kwwong on Tue Dec 13, 2011 12:38 pm

22Vac x 1.4 = 31Vdc

If you measure only 24Vdc at out put, is it a concern of load is too high?

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Re: John Lindsey Hood amp

Post by zyker on Tue Dec 13, 2011 12:40 pm

kwwong wrote:22Vac x 1.4 = 31Vdc

If you measure only 24Vdc at out put, is it a concern of load is too high?

Perhaps CRC configuration?

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Re: John Lindsey Hood amp

Post by kp93300 on Tue Dec 13, 2011 10:53 pm

I use RCL and then the cap multiplier . The R is 0.25 R that i removed from another dead class a amp .
The TIP 3055 of the multiplier is on a small heatsink also .

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