Hello,
Going to make a separate thread for my problem (have talked about this in some other threads).
Problem: Output tube starts squealing after a little listening (transfers into the right channel only). This happens random and it does not matter if I change the output tube or drive tube or both (RCA 6080, GE 6AS7GA, TS 5998/ RCA 12au7, Siemens E80CC). Nothing also changed when I changed output caps for film type and added bypass caps to them.
Thing how to get rid of it: Tap on the large tube or pull out and insert again the headphone plug. But the squeal returns after a few seconds or minutes.
When I tap on the aluminum panel there is weird distortion in the right channel.
Tried: Made sure that every component on the aluminum panel is correctly attached and checked every solder joint. Did the bamboo stick test and changed the power switch (stock one went bad after getting too much soldering heat). Did all the measurements also. And I will post them here:
Resistances:1) *
2) *
3 ) 0 ohm
4) *
5) *
6) 2.48K ohm
7) 2.92K ohm
8 ) 0 ohm
9) 2.94K ohm
10) 2.48K ohm
12) 0
14) 0
20) 0
22) 0
B3) 2.92K ohm
B6) 2.94K ohm
RCA Jacks:
Ground lug 0 ohm
Center pin 49.2K/ 49.2K ohm
Powerswitch ON: 0.5 ohm
Transformator 1-2: 45.9 ohm
Voltages:1) 79V
2) 171V
3) 0
4) 171V
5) 81V
6) 0
7) 103V
8 ) 0
9) 105V
10) 0
11) 0
12) 0
13) 172V
14) 0
15) 192V
20) 0
21) 214V
A1) 81V
A2) 0
A4) 0
A5) 0
A6) 79V
A7) 0
A9) 0
B1) 79V
B2) 172V
B3) 103V
B4) 80V
B5) 172V
B6) 105V
B7) 0
B8) 0
L-N voltage: 247V
Transformator 1-2: 242V
Transformator 4-5: 5.7V
Transformator 6-7: 167V
Transformator 9-10: 167V
I soo love my Crack but this squeal thing won't let me enjoy music. I will include some pics too. If anyone have some questions or ideas what to test or measure etc. then please share
