Search found 345 matches

by grtamp
Mon Nov 14, 2022 11:13 am
Forum: Technical Discussion
Topic: voodoo vibe roger mayer problem
Replies: 5
Views: 617

Re: voodoo vibe roger mayer problem

bad solder joint!

Thanks
R.
by grtamp
Fri Nov 11, 2022 12:12 pm
Forum: Technical Discussion
Topic: voodoo vibe roger mayer problem
Replies: 5
Views: 617

Re: voodoo vibe roger mayer problem

thanks , but the led works
by grtamp
Fri Nov 11, 2022 10:59 am
Forum: Technical Discussion
Topic: voodoo vibe roger mayer problem
Replies: 5
Views: 617

voodoo vibe roger mayer problem

Hi, I have a problem with my effect pedal Roger Mayer Vodoo Vibe.
The effects work , but the red led stay off when engage on.
any suggestion about the issue is well appreciated

Thanks
R
by grtamp
Mon Oct 24, 2022 10:04 am
Forum: Dumble Discussion
Topic: #183 bass pot
Replies: 6
Views: 825

Re: #183 bass pot

checked, mine has 311k value :wink:
by grtamp
Thu Oct 20, 2022 9:59 am
Forum: Dumble Discussion
Topic: #183 bass pot
Replies: 6
Views: 825

Re: #183 bass pot

Thanks Ryan and Ian :wink:
by grtamp
Tue Oct 18, 2022 10:02 am
Forum: Dumble Discussion
Topic: #183 bass pot
Replies: 6
Views: 825

#183 bass pot

Hi, can I use 500K for bass pot in the #183?
I can see 300k, but is not a standard value.

Thanks
by grtamp
Sun Apr 22, 2018 9:55 am
Forum: Technical Discussion
Topic: Hartke HA4000 bias setting
Replies: 0
Views: 13572

Hartke HA4000 bias setting

Hi , I have an Hartke HA4000 on my workbench and I have to set the bias, on the schematic there are no info about the correct setting.
Someone can help me?

Thanks
R.
by grtamp
Thu Mar 08, 2018 10:43 pm
Forum: Technical Discussion
Topic: Check shorting pins of tubes
Replies: 5
Views: 1043

Re: Check shorting pins of tubes

Hi Phil, make some test with DMM in continuity mode on some shorting tubes, but the test don't work!.. When the tube is pulled into the amp , the fuse blowing, so your suggestion is not ok for me.

Someone have an idea for a little circuit for check tubes!
Thanks
R.
by grtamp
Thu Mar 01, 2018 10:18 pm
Forum: Technical Discussion
Topic: Check shorting pins of tubes
Replies: 5
Views: 1043

Re: Check shorting pins of tubes

Hi Phil, Thanks, but I thought the tube under test must be in power on condition!!?!! Like old tube tester!
by grtamp
Thu Mar 01, 2018 7:31 pm
Forum: Technical Discussion
Topic: Check shorting pins of tubes
Replies: 5
Views: 1043

Check shorting pins of tubes

Hi all, There is a simple circuit to use for testing short pins of the tubes?

I have a multi tap transformer and maybe I could build a shorting tester.

my PT secondary:
0 - 130V @ 45mA
0 - 60V @ 30mA
14 - 0 - 14V
0 - 9V 45mA

Thanks
R.
by grtamp
Tue Jul 25, 2017 5:28 pm
Forum: Fender Discussion
Topic: Fender Deluxe 5E3 with tremolo
Replies: 15
Views: 3314

Re: Fender Deluxe 5E3 with tremolo

ok.... , the 250K pot is a rev-log type like 3M3 pot?

R.
by grtamp
Tue Jul 25, 2017 1:35 pm
Forum: Fender Discussion
Topic: Fender Deluxe 5E3 with tremolo
Replies: 15
Views: 3314

Re: Fender Deluxe 5E3 with tremolo

Yes, I tried your last scheme with 12ax7!
by grtamp
Tue Jul 25, 2017 1:08 pm
Forum: Fender Discussion
Topic: Fender Deluxe 5E3 with tremolo
Replies: 15
Views: 3314

Re: Fender Deluxe 5E3 with tremolo

Hi , I tried to wired your scheme today, but don't work , compared to 6g9 vibrato , seems to me the negative voltage on depth pot is missing.( in the schematic lug is on ground!)
Neg voltage is required or not?
by grtamp
Tue Jul 25, 2017 11:30 am
Forum: Fender Discussion
Topic: Fender Deluxe 5E3 with tremolo
Replies: 15
Views: 3314

Re: Fender Deluxe 5E3 with tremolo

Thanks , I have a 12AX7 I can use! , 1/2 triode tremolo circuit is a good start ,.. let the other half triode unuse is a problem?

R.
by grtamp
Tue Jul 25, 2017 8:33 am
Forum: Fender Discussion
Topic: Fender Deluxe 5E3 with tremolo
Replies: 15
Views: 3314

Fender Deluxe 5E3 with tremolo

There is a way to add a tremolo circuit to a Fender deluxe model 5E3?.
Someone has already done?.

thanks
R.