Sjöström Audio DIY forum

heaveno,

got an Alps 27 10 K stereo Pot.

Branko
(The Text Box changes the word " H E L L O" to "heaveno" when I click Post?)

Try to find a dual 10 kohm pot logarithmic of a good quality. Try to find something and I can say yes or no to your choice.

heaveno,
just bought the PCB and planning to assemble it.
Do you have any recommendation for the Volume control?
And how would it be implemented?Thank you.

Branko

Quote from: espirit on December 06, 2024, 04:03:40 PMT2 replaced on PCB 1, points on K2 continue to bounce.


D1,D2,D3,D4,and DZ1,all changed, K2 points continue to bounce.

Not Shure what to try next?.

Will please measure the voltages around T1 and T2 when you have 24 VDC connected across DZ1.

Try to measure the coil resistance of the K2 to rule out any shorts.

T2 is suspect since you can't have more than 1 V across base-emitter.

Esprit wrote:

heaveno, I have two of the SST01 rev.1, one each in mono Pass F5t.
Following application of 24v across DZ1, the following results were obtained.


PCB No1
T3, B/E= 0v.    C/E= 22v
T2, B/E= 23v.   C/E= 23.1v
T1, B/E= 143mv. C/E= 40mv


PCB No2
T3, B/E= .94v.  C/E= 60mv
T2, B/E= .4v.   C/E= 22.2v
T1, B/E=.623v.  C/E= 1mv

December 02, 2024, 09:09:24 AM
No worries. Take your time.

Esprit wrote:

November 29, 2024, 11:26:43 AM
Please accept my apologies for the delay in answering (I am waiting the return of my bench power supply)

November 21, 2024, 06:36:30 PM
First of all (if possible) use a 24 V source with current limitation. It's much safer not having live voltage.


Connect 24 V across the DZ1 zener or similar point. Start with T3 and go backwards. What is the base-emitter voltage on T3? Should be 650 mV and the collector-emitter voltage less than 200 mV.

Esprit wrote:

heaveno Folks very new to this forum


After two years of uninterrupted service, Relay K2 fails to latch.
When power is applied the points continuously bounce, is there a fix.