Search found 1619 matches
- Mon May 27, 2024 6:49 pm
- Forum: Technical Discussion
- Topic: Synergy Capacitors
- Replies: 4
- Views: 82
Re: Synergy Capacitors
Me too. But prices are too high... so i changed, i have luck nowadays with axial TAD Mustard caps (probably also chinese, cheap, but sounding very nice), looks good too
- Mon May 27, 2024 6:45 pm
- Forum: Fender Discussion
- Topic: 5E3 build loud hum/buzz once warmed up
- Replies: 7
- Views: 124
Re: 5E3 build loud hum/buzz once warmed up
edit, this post on top is for working amp here is major problem short circuit to the ground on Ub+ line, so new procedure: 1. switch off the amp 2. drain all the capacitors , with 10k to the ground until discharges 3. multimeter in ohms, and touch every node on + cap and to the ground, find out whic...
- Mon May 27, 2024 6:40 pm
- Forum: Fender Discussion
- Topic: 5E3 build loud hum/buzz once warmed up
- Replies: 7
- Views: 124
Re: 5E3 build loud hum/buzz once warmed up
1. remove feedback wire from the speaker terminal
2. start amp again
3. if there is no any noise and amp works, switch off
4. change anode wires from OT to pins 3 - sockets, A1 <-> A2
5. start amp again, verify all is correct
2. start amp again
3. if there is no any noise and amp works, switch off
4. change anode wires from OT to pins 3 - sockets, A1 <-> A2
5. start amp again, verify all is correct
- Mon May 27, 2024 6:37 pm
- Forum: Technical Discussion
- Topic: Synergy Capacitors
- Replies: 4
- Views: 82
Re: Synergy Capacitors
font , colors, quite bad printing and shape looks like Sozo
- Fri May 24, 2024 3:43 pm
- Forum: Dumble Discussion
- Topic: 2nd Gen Build
- Replies: 88
- Views: 4132
Re: 2nd Gen Build
1mV AC balance on cathodes? this is negligible... also 2mV is negligible (impossible to hear that), i would leave this like it is
- Thu May 23, 2024 8:20 pm
- Forum: Dumble Discussion
- Topic: Dumble ODS 102 Speaker Cab
- Replies: 5
- Views: 311
Re: Dumble ODS 102 Speaker Cab
Maybe the 12-65 Creamback, but the AlNiCo Creamback is anything but dark. Alnico Cream.. i have 2 pcs.. also is not bright too.. playing this speaker last 2 years...now is too smooth.. sound is great. Saying that will be good to try Neo Creamback and Alnico Cream in 212 box, probably they will make...
- Wed May 22, 2024 3:24 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 54
- Views: 2018
Re: A SSS Build
Sockets are how i see new.. and Belton, so means high quality.. Never failed any in my life. So there is only 0.1% of chance that sockets are a problem.. Probably output tubes..
- Wed May 22, 2024 3:22 pm
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 54
- Views: 2018
Re: A SSS Build
This is bad tube problem.. pls measure resistance directly on the tube pins, between 2-3.
- Wed May 22, 2024 3:16 pm
- Forum: Technical Discussion
- Topic: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise
- Replies: 21
- Views: 783
Re: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise
Its a shame you can't get 220uF in non polarized form in a non gigantic form factor as that would be the easiest way to deal with this problem lol. I Now i see you are too young and green.. it is ashame that you dont know this :mrgreen: : 220uF is very easy to make, from 470uF + 470uF regular elect...
- Wed May 22, 2024 3:04 pm
- Forum: Dumble Discussion
- Topic: Dumble ODS 102 Speaker Cab
- Replies: 5
- Views: 311
Re: Dumble ODS 102 Speaker Cab
Creambacks are little bit dark... Neo Creamback is maybe the best to my ears (i had all od them)
- Tue May 21, 2024 7:22 pm
- Forum: Technical Discussion
- Topic: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise
- Replies: 21
- Views: 783
Re: Common Mode Filtering - A slightly impractical approach to reducing heater induced noise
Thanks for all the replies, I'll try to address everyone's points in order: -Electrostatic shield would definitely be effective in combating this issue. Unfortunately I don't know of anyone making off the shelf PT's with them included. I'm at the point now where I could fairly easily design my own ...
- Tue May 21, 2024 7:18 pm
- Forum: Technical Discussion
- Topic: OT Primary Question
- Replies: 7
- Views: 440
Re: OT Primary Question
it is ok.. also there is wide range of usable impedances for all the tubes.. nothing to worry about..in datasheets yu can find distortion vs load impedance , this is changing, also little bit he character.. but is it ok
- Tue May 21, 2024 4:53 am
- Forum: Technical Discussion
- Topic: OT Primary Question
- Replies: 7
- Views: 440
Re: OT Primary Question
PP or SE?
- Tue May 21, 2024 4:49 am
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 54
- Views: 2018
Re: A SSS Build
I had the same problem in one amp, when inside the box.. chassis and power transformer were extremelly hot.. while outside on the table, chassis and PT temp was just moderate, nothing to worry about... Then i discover that there is no sufficient air circulation in the cabinet, and tubes were heating...
- Tue May 21, 2024 4:44 am
- Forum: Dumble Discussion
- Topic: A SSS Build
- Replies: 54
- Views: 2018
Re: A SSS Build
I only have one fuse, 3 amp slow on input power. In Operate 118vac wall voltage 320-0-322 vac secondary. 320vac leg is also feeding bias circuit. B+ 414vdc Bias -360vdc at 5mA PT's biased to 27mA with -49 volts. if this is in operation all looks ok.. temperature is ok also little bit hot, 45 deg C ...