John Lindsey Hood amp

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

I have a picture here

http://www.freeimagehosting.net/a75a0

kp93300,

Hahahaha 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 )

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

cheers

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

kp93300

I see, thanks man.

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

Have you heard the Zen amplifier before?



cheers

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



kp93300

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

some short before sending to garage....







will update latest photo once it ready...

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.

cheers

kp93300

22Vac x 1.4 = 31Vdc

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

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?

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 .

kp93300