GB Pass M2 Clone Boards with 120mm UMS spacing by Tea-Bag

[Lbud4]

Do you have power supply boards?

 

[Tea-Bag]

Do you have power supply boards?

Yes, but not as many as M2c boards.

 

[tommydoan84]

hi Tea,

I'd like to sign up for 1 set of stereo M2C boards, Output mosfet and a pair of Edcor Transformers. I don't need PS board since I had my own PS setup already.

You can PM me with the total and paypal email. I will transfer the money.

Thanks,
Tom

 

[Tea-Bag]

hi Tea,

I'd like to sign up for 1 set of stereo M2C boards, Output mosfet and a pair of Edcor Transformers. I don't need PS board since I had my own PS setup already.

You can PM me with the total and paypal email. I will transfer the money.

Thanks,
Tom

Signed you up. I Will private message everyone once the Edcors arrive.

 

[tommydoan84]

Thank you Tea

Signed you up. I Will private message everyone once the Edcors arrive.

 

[11brother]

Hi Tea

Please sign me up for M2C boards, PS board, Output Mosfet, and pair Edcor transformers.

PM me total & paypal email.

Thanks

bob

 

[Tea-Bag]

I have the M2c boards, power supply boards (a couple)
Edcor transformers and the Vishay/Harris mosfet combo currently in stock. PM with email address if interested.

 

[tommydoan84]

I have the M2c boards, power supply boards (a couple)
Edcor transformers and the Vishay/Harris mosfet combo currently in stock. PM with email address if interested.

Teabag, I have sent you PM message.

Thanks,
Tom

 

[Tea-Bag]

Teabag, I have sent you PM message.

Thanks,
Tom

Hi Tom, I did not get it. Can you try again?

 

[tommydoan84]

Hi tea,

I just resent my message. Can you check and reply me in PM ?

Thanks,
Tom

Hi Tom, I did not get it. Can you try again?

 

[tommydoan84]

Thank you Tea. The boards and kit have been received promptly today!

Many thanks
Tom

 

[kevincamel]

I’d like to order the audio boards and PSU board. Can you send an invoice to my email?

 

[Tea-Bag]

I’d like to order the audio boards and PSU board. Can you send an invoice to my email?

I only have the audio boards and the Edcor transformers in stock right now. Did you want to proceed with those?

PSU are currently out of stock.

 

[kevincamel]

Sure. Can you pm me with an invoice and payment options?

 

[Tea-Bag]

I am currently sold out of the boards.
I am attaching a sign up sheet in my signature. I will be pre-ordering these boards. So with the transformers and boards, I suspect it will be 4-6 weeks and I will be re-stocked.

 

[luxwinter]

Will the universal power supply board sold on the diyaudio store work with this amp?

 

[zman01]

I think they will be fine, that is what I used for a range. If they run too hot - the Jfets, you could change the 10R source resistors to 15-20R to draw a little less current.

With reference to this post, where to measure if JFETs are running hot/or not? The ones that I plan to use have IDSS of 10.7 mA.

 

[Tea-Bag]

With reference to this post, where to measure if JFETs are running hot/or not? The ones that I plan to use have IDSS of 10.7 mA.

Hi ZMAN,
I am not the best in calculations and assumptions, but if Ohms law is fully in play.

11ma @ 24v without Source resistor is .264ma so a bit more than half of 400ma max. probably want to be more around half max, so 200 ma, so I think a 10-20R resistor is would cut this back.

In my experience high idss JFETs are fine if source resistor is tuned good. Otherwise when they run too much juice through them they run more unstable, making sometimes the other end of the circuit a bit more wild to stabilize.
Salas and I ran into that with prototypes of the Folded RIAA, until we ironed out a few elements.

BTW, I have run 10.5ma ones for probably two years in mine without any issues. I listen to it alot, as it's in my work office.

 

[zman01]

Hi Tea-Bag,

Thanks for the explanation.

I have 10R installed. I also got 15R in hand. I shall increase the value to 15R to be on the safe side.

 

[Tea-Bag]

Okay, I have ordered some more boards and Edcor transformers.

Many have already signed up already in the spreadsheet. I will leave it open for now until stock arrives or I sell out of parts.