Search found 271 matches

by jcsifu
Fri Mar 29, 2024 3:54 am
Forum: Dumble Discussion
Topic: Starting to populate the chassis....
Replies: 109
Views: 4900

Re: Starting to populate the chassis....

ijedouglas wrote: Fri Mar 29, 2024 3:04 am and the silver mica snubbers on V1b and V2 to ceramic.
Definitely this
by jcsifu
Sat Apr 09, 2022 6:55 am
Forum: Dumble Discussion
Topic: Draloric Resistors - Before and After - Video Demo
Replies: 51
Views: 11129

Re: Draloric Resistors - Before and After - Video Demo

I recall reading another account where the observer was struck by HAD's meticulous checking of the resistance of his solder connections. This has come up a few times, can someone explain how one could measure a solder connection? I never understood this one nor have I read it in any past manuals as...
by jcsifu
Sat Apr 09, 2022 6:52 am
Forum: Dumble Discussion
Topic: Draloric Resistors - Before and After - Video Demo
Replies: 51
Views: 11129

Re: Draloric Resistors - Before and After - Video Demo

I recall reading another account where the observer was struck by HAD's meticulous checking of the resistance of his solder connections. This has come up a few times, can someone explain how one could measure a solder connection? I never understood this one nor have I read it in any past manuals as...
by jcsifu
Fri Apr 08, 2022 5:09 am
Forum: Dumble Discussion
Topic: Draloric Resistors - Before and After - Video Demo
Replies: 51
Views: 11129

Re: Draloric Resistors - Before and After - Video Demo

I recall reading another account where the observer was struck by HAD's meticulous checking of the resistance of his solder connections. This has come up a few times, can someone explain how one could measure a solder connection? I never understood this one nor have I read it in any past manuals as...
by jcsifu
Sat Feb 26, 2022 7:40 pm
Forum: Dumble Discussion
Topic: Has anyone seen this Dumble before
Replies: 30
Views: 4010

Re: Has anyone seen this Dumble before

talbany wrote: Sat Feb 26, 2022 1:30 pm Peter Lerche's Bluesmaster
6L6 tubes. Serial no 0153. No skyliner delivered 91/92
Speaker Cab/ Eminence Texas Heat 12" speaker in a semi-open cabinet





Tony
I really like Peter Lerche's tone's in this video. What tone stack is this?
by jcsifu
Mon Oct 25, 2021 6:30 pm
Forum: Dumble Discussion
Topic: Bonamassa 50W ODS gut shot
Replies: 33
Views: 8457

Re: Bonamassa 50W ODS gut shot

More than likely rebrands the originals were made in Japan.. I have seen a few NOS floating around but never the right values :roll: I personally do not care if they are Axials or radials? I'll take em! Think they are worth $945 a piece? https://www.ebay.com/itm/324179476691?chn=ps&mkevt=1&mkcid=28...
by jcsifu
Sun Aug 29, 2021 9:29 pm
Forum: Dumble Discussion
Topic: ECG R415 Metal Film
Replies: 0
Views: 21937

ECG R415 Metal Film

Does anyone know how close these would be to the NTE that used to be available at Radio Shack? They are MF flameproof.
by jcsifu
Sat Jul 17, 2021 3:53 am
Forum: Dumble Discussion
Topic: New Dumble demo vid. But....
Replies: 25
Views: 5774

Re: New Dumble demo vid. But....

Awesome cab set Taylor
by jcsifu
Sat Jul 17, 2021 3:51 am
Forum: Dumble Discussion
Topic: New Dumble demo vid. But....
Replies: 25
Views: 5774

Re: New Dumble demo vid. But....

Dumble abuse :lol: ...would of liked to hear the bridge pickup clean
by jcsifu
Sat Jun 19, 2021 7:22 pm
Forum: Dumble Discussion
Topic: MK8 vs. MK3 Roderstein
Replies: 3
Views: 747

Re: MK8 vs. MK3 Roderstein

Well, guess we'll see soon enough. Tony and Ian thanks for listing your experiences with other resistors and what you heard diff between ratings. The ability to fine-tune through component selection was new to me a year or so ago, but I'm having a fun experience with it so far. I'm starting to feel ...
by jcsifu
Sat Jun 19, 2021 1:31 am
Forum: Dumble Discussion
Topic: MK8 vs. MK3 Roderstein
Replies: 3
Views: 747

MK8 vs. MK3 Roderstein

Just got ahold of some Roderstein MK8 (2watt) for plate and cathode values for a 102 build. I had found someone with some MK3's (.5 watt) but they haven't been in contact for a while now. What do you guys think, will there be any difference in how the MK8 sound instead of the MK3? Should sound the s...
by jcsifu
Sun May 30, 2021 7:45 am
Forum: Dumble Discussion
Topic: Importance of 500pf bypass cap on V1B
Replies: 22
Views: 2880

Re: Importance of 500pf bypass cap on V2A

When I was messing around with them I found that its critical to measure and make sure they are at least 500pf. Lower and you start to lose the sing. If a higher value produces better sing, I wonder what would be the highest value that could be substituted without it being too big of a departure fr...
by jcsifu
Thu Mar 04, 2021 4:31 am
Forum: Dumble Discussion
Topic: ODS pre with Subminis (complete)
Replies: 47
Views: 7316

Re: ODS pre with Subminis (complete)

Would you be able to give info on the power supply boards you are talking about? I am building an all pc board (except tube) dumblator that was originally going into a 124 based amp. After reading the issues others have had with an in the amp application, I've decided to house it in a separate box ...
by jcsifu
Wed Mar 03, 2021 6:54 am
Forum: Dumble Discussion
Topic: ODS pre with Subminis (complete)
Replies: 47
Views: 7316

Re: ODS pre with Subminis (complete)

Jubal, that turned out great, nicely done! I thought the same re using 12V input and powering the filaments directly; fewer parts and less heat. For anyone who might want to play with this concept, there are some pre-built boards available that can supply ~300V from 12 (basically the same SMPS circ...
by jcsifu
Mon Feb 22, 2021 4:22 am
Forum: Dumble Discussion
Topic: Amp Porn
Replies: 49
Views: 5701

Re: Amp Porn

Hey Ian Right now all 3 amps have the deep switch config. Not a big fan of the Mid boost.. This is what I generally try to stick to,depending on parts available at the time I have X5F 330's on the board as treble caps (390's are tough to find) and 250's on the bright..471 (mica)for bypass on V1B/22...