DLH Amplifier: The trilogy with PLH and JLH amps

[lohk]

So it will be one pair of boards to
Thimios

and one pair to
Huggygood

Gaborbela, shall I send another pair to you too?

all the best to you all
---------
Klaus

 

[gaborbela]

Gaborbela, shall I send another pair to you too?

all the best to you all
---------
Klaus

I do not have these PC boards, I wanted to make a homebrew type like so many other PC boards waiting to be finalized and etched. To that, I have to go to Staples (a bit far away) to do laser copy for Iron transfer. Winter time out of my disability I stay at home as much as possible. I can not drive at all so any travel is difficult to me. In case you decide I will take a set of PC boards I will not need to wait until spring. Please PM me. Thank you!

 

[Vunce]

Hello Prasi,

I received my boards today and they look great!!
Thank you.

Kind regards,
Vunce

 

[prasi]

Thank you Vunce. All the best for your build.
Regards
Prasi

 

[huggygood]

@ Lohk
I reply by email for the procedure .
thank's

 

[thimios]

So it will be one pair of boards to
Thimios

and one pair to
Huggygood

Gaborbela, shall I send another pair to you too?

all the best to you all
---------
Klaus

Thanks for your offer!

 

[huggygood]

I received my 2 pcb from Klaus !!
thank you to all contributors !!
I just finished my nac42/nap 110 clone,i still have a tubes amp on the table to finish, and this one will take me time and after I start the DLH!

PS: I like the white points to the optional/additional parts
Klaus

 

[marconi118]

Have you tried dlh with hitachi laterals 2sk1058?

 

[manniraj]

Dear Manniraj,
Where in India are you ? If in Hyderabad, you can collect two each from me !
--gannaji

Thank you, i am from Bangalore but have some friends in Hyderabad whom I can request to collect. I will send you a PM.

thanks again.

 

[marconi118]

How does it sound and compare to the plh of pass?

 

[prasi]

try to find out youself if you like it better than PLH. lokh might b having some pcb.

 

[huggygood]

good point prasi

 

[arcgotic]

Anybody can share please a import-ready BOM for Mouser site? Thanks!

I am not experienced and probably will chose bad parts.. :|

 

[prasi]

There Is one made by manniraj and edit3d by me. Few posts ago.
If i get time today, I will put part numbErs in that.
Regards
Prasi

 

[marconi118]

OK.

I upload a box of limitations referring to the version shown below. I hope it will be useful to clarify your doubts. <snip>

Lowering a bit the gain of the DLH is-it possible to input 2.8Vrms on 8ohm with pot set fro minimum THD?

 

[prasi]

Anybody can share please a import-ready BOM for Mouser site? Thanks!

I am not experienced and probably will chose bad parts.. :|

Hello arcgotic,
Here is attached bom with mouser part nos. Done quickly.
once you add all parts in the bom to mouser cart (copy part numbers from attached file and search in mouser search field and specify qty and click add to cart), please share the cart here. I will have look again.

regards
Prasi

 

[diegomj1973]

Lowering a bit the gain of the DLH is-it possible to input 2.8Vrms on 8ohm with pot set fro minimum THD?

That's possible. One of the possibilities is to increase the resistance of 56 ohms to something like 82 ohms (series E12). The most suitable value would be achieved with two resistors in parallel of 150 ohms each, instead of the 56 ohms alone (ie, achieve about 75 ohms). If E24 series is used, simply a 75 ohm instead of the 56 ohm.

 

[marconi118]

decreasing gain will affect preformance?

 

[arcgotic]

Hello Prasi,

Please have a look here
Mouser Electronics, Inc. Romania

I have doubled all parts number (so it is for stereo amp), and also put 6 MOSFETS instead of 4, just to be sure if 2 go up in smoke or destroyed other way..

Regards,
Daniel

Hello arcgotic,
Here is attached bom with mouser part nos. Done quickly.
once you add all parts in the bom to mouser cart (copy part numbers from attached file and search in mouser search field and specify qty and click add to cart), please share the cart here. I will have look again.

regards
Prasi

 

[diegomj1973]

decreasing gain will affect preformance?

Reducing the gain makes the total distortions tend to go down a bit. An extension in the high frequency response could be favored, although there are previous limitations imposed by a capacitor in the feedback network. The Jonhson noise increases very little.