H2 V2 BUILD

[peppennino]

 

[shamino15]

Finally, a H2 R2 has been built on a general purpose board with lower Vp J113. An interesting smallest monster to play. Socket is used to do experiments with different J113s. Thanks PaPa.

.

 

[Nelson Pass]

Very DIY.

 

[Kokanee]

Nice work shamino15. Could you post pics of the bottom of the vero board and another angle pic that highlights the connectors.

Thanks,

MM

 

[shamino15]

Nice work shamino15. Could you post pics of the bottom of the vero board and another angle pic that highlights the connectors.

Thanks,

MM

Thanks. Here are the pics and sorry for my bad soldering skill. Note: R6 and P1 values are based on J113 Vp as in my post #207.

 

[Kokanee]

Thanks for the pics

MM

 

[peppennino]

WIP...

 

[turion64]

View attachment 1033018
WIP...

Excellent! Almost there!

 

[mkane77g]

Our board arrived

 

[rubah.ganteng]

Project delays coz Quarantine 😭
I can't wait to assemble 🥰😀
My problem I can’t find j113 and 3386P trimmer 😭
Pls advice me replacement part🙏
1. J113 replacement wit another product?..
2. Trimmer 3386P replace with 3296 or RM065?

 

[mkane77g]

BOM has C1 - C2 mixed up

 

[mkane77g]

Is this installed between the amp and pre-amp?

 

[mkane77g]

^^^^^^can't go there. no sound.

 

[mkane77g]

Works between phono stage and TVC. Interesting. It's been playing less than a minute. More air, wider soundstage, pinpoint imaging. Had to turn the volume down a notch also.

 

[elwood625]

Did you build it according to the schematic and BOM? If so, it has gain like a line stage preamp, add a volume pot and you have a line stage preamp.
If you want it between amp and preamp, then change to unity gain.

 

[mkane77g]

I did build it to the schematic.

How do I change to unity gain? I use TVC for attenuation.

 

[mkane77g]

Looks like I can adjust R1-R2 values, or not.My concern is can I-should I use it between my phono stage and TVC?

As is it doesn't work in between my amp-TVC.

 

[elwood625]

R1 at 22k and r2 at 10k is more like it.

Here

 

[elwood625]

I use mine with unity gain and it goes between amp and preamp.

 

[mkane77g]

I'll read that thank you very much. I just may have both of those resistors.