Search found 4601 matches
- Fri May 31, 2024 8:26 pm
- Forum: Technical Discussion
- Topic: Tremolo Changes after EL84 to 6V6 Swap
- Replies: 4
- Views: 158
Re: Tremolo Changes after EL84 to 6V6 Swap
Well -33 is well in the ball park for what a stock PR wants!
- Wed May 29, 2024 9:54 am
- Forum: Technical Discussion
- Topic: anyone looked at DR-Z stuff ?
- Replies: 2
- Views: 166
Re: anyone looked at DR-Z stuff ?
If you don't have it yet or even more so have not played it yet then why are you looking for mod's right off the bat?
- Tue May 28, 2024 10:01 am
- Forum: Technical Discussion
- Topic: What do you think causes pins 2 and 3 to arc in octal sockets.
- Replies: 10
- Views: 233
Re: What do you think causes pins 2 and 3 to arc in octal sockets.
I think it's also due to the ac filament power. Pin 3 is highly positive D.C. Pin 2 at a rate 50 or 60 times a second goes from being positive ac to zero and then that starts the attraction of D.C. Then pin2 then goes highly negative in relation to the D.C. Polarity of pin 3, so even a higher level ...
- Fri May 24, 2024 10:56 am
- Forum: Technical Discussion
- Topic: Fender Brownface 6G7a question
- Replies: 11
- Views: 501
Re: Fender Brownface 6G7a question
I don't know if you have ever heard it, but the tremolo on a Vibrochamp has great depth also .
Change out the caps to slow it down more and pop in as strong tube and your in love!
Change out the caps to slow it down more and pop in as strong tube and your in love!
- Mon May 20, 2024 8:35 pm
- Forum: Technical Discussion
- Topic: OT Primary Question
- Replies: 7
- Views: 632
Re: OT Primary Question
I don’t understand chancing running the 6K6 outputs.
The difference in the output wattage between these and a 6v6 with cathode bias and in push pull will not change the SPL of the amp by much if that’s your main goal.
The difference in the output wattage between these and a 6v6 with cathode bias and in push pull will not change the SPL of the amp by much if that’s your main goal.
- Sat May 18, 2024 11:30 am
- Forum: Technical Discussion
- Topic: Princeton Reverb tremolo squeal
- Replies: 5
- Views: 334
Re: Princeton Reverb tremolo squeal
Is the wire that feeds that pot running anywhere near either of the PI output coupling caps?
- Sat May 18, 2024 11:21 am
- Forum: Technical Discussion
- Topic: Replace overdrive pedal with real tube?
- Replies: 7
- Views: 456
Re: Replace overdrive pedal with real tube?
Since your now unused tube is somewhere down stream of the first gain stage of the amp if you implement what your thinking of doing you will more then likely have a oscillating monster on your hands, especially if you only use one section of that tube since that will change the phase of the whole am...
- Wed May 15, 2024 9:03 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 29
- Views: 1527
Re: Illinois brand capacitors still bad?
Don’t forget with these great little testers to discharge the cap before testing.
My co worker killed is tester 3 days after he built it with a charged up 450 volt cap.
You need to confirm after discharging that there is no more voltage left in the cap then the battery that powers it.
My co worker killed is tester 3 days after he built it with a charged up 450 volt cap.
You need to confirm after discharging that there is no more voltage left in the cap then the battery that powers it.
- Wed May 15, 2024 2:10 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 29
- Views: 1527
Re: Illinois brand capacitors still bad?
Here’s a 1000uf 50v Rubycon that swollen and starting to leak and it still test out at only .94 ohms, unfortunately it’s only 5 years old.
- Tue May 14, 2024 12:21 pm
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 29
- Views: 1527
Re: Illinois brand capacitors still bad?
Yes, sorry, more like ten times!
I had the morning coffee brewing but none yet to start the brain up.
I had the morning coffee brewing but none yet to start the brain up.
- Tue May 14, 2024 11:20 am
- Forum: Technical Discussion
- Topic: Illinois brand capacitors still bad?
- Replies: 29
- Views: 1527
Re: Illinois brand capacitors still bad?
Thanks for this test out and post, and yes that’s over a 10% different which is a lot!
- Sat May 11, 2024 11:19 am
- Forum: Technical Discussion
- Topic: Can I Parallel 2 Mosfets in VVR?
- Replies: 38
- Views: 1466
Re: Can I Parallel 2 Mosfets in VVR?
They also need to be mounted right next to each other so that all wire length used is the shortest. Also I consider the leads of semiconductors as part of its built in heat sink and as such contributing to the items wattage rating. For Zener diodes used in tube amps ( especially if near the output t...
- Fri May 10, 2024 10:05 am
- Forum: Technical Discussion
- Topic: ID this tube?
- Replies: 7
- Views: 478
Re: ID this tube?
It rang a bell to me since I have had a few great Marconi tubes over the decades, and instead of diving into one of my amps that has one in it to get a photo for you I went to the Tube World Express site for a photo.
- Thu May 09, 2024 10:01 pm
- Forum: Technical Discussion
- Topic: Two 20 watt amps in one chassis - layout/grounding
- Replies: 17
- Views: 847
Re: Two 20 watt amps in one chassis - layout/grounding
To have more front panel real estate you might consider stacked pots for two of the tone controls.
To get a nice leg up on a two channel amp layout in one chassis you might want to check out the schematic of a big stereo tube amp like a HH Scott 272.
To get a nice leg up on a two channel amp layout in one chassis you might want to check out the schematic of a big stereo tube amp like a HH Scott 272.
- Thu May 09, 2024 3:37 pm
- Forum: Technical Discussion
- Topic: ID this tube?
- Replies: 7
- Views: 478
Re: ID this tube?
Due to the large area of white lettering that tube has and the size and shape of the plates and the round getter I think this is what your tube is, or atleast the brand that it is.