Search found 44 matches

by keewee
Sun Nov 25, 2018 6:23 pm
Forum: Fender Discussion
Topic: Princeton Reverb clone treble cap leakage
Replies: 18
Views: 2213

Re: Princeton Reverb clone treble cap leakage

yes at higher frequency the cap 'Q' becomes more important when passing audio signals. not all caps are designed for a high 'Q'.
by keewee
Thu Apr 27, 2017 4:27 pm
Forum: Fender Discussion
Topic: Favourite NOS Carbon and Metal resistors for balckface
Replies: 8
Views: 1393

Re: Favourite NOS Carbon and Metal resistors for balckface

use carbon comps only where you have a large voltage swing, to generate even harmonics, this is usually the second or third stage plate resistor, keeping power rating close to its working range also increases the 2ND harmonic. This to me gives good tone while lowering the noise floor. Physics
by keewee
Tue Apr 11, 2017 9:22 pm
Forum: Fender Discussion
Topic: fender deluxe homemade too bright and clean
Replies: 9
Views: 1864

Re: fender deluxe homemade too bright and clean

+1 on the bright cap 0.47 pf to 500 pf high pass, to your own taste. Leo designed this to be a clean amp, but can distort if stressed. +2 Leo.
by keewee
Wed Feb 15, 2017 4:56 pm
Forum: Fender Discussion
Topic: Favourite NOS Carbon and Metal resistors for balckface
Replies: 8
Views: 1393

Re: Favourite NOS Carbon and Metal resistors for balckface

Bright cap I like polystyrene seems a little smoother to me, some people even mix two, this is highly subjective and a personal preference.
by keewee
Mon Aug 01, 2016 10:16 pm
Forum: Trainwreck Discussion
Topic: Trainwreck Liverpool build comes to Life!
Replies: 9
Views: 2677

Re: Trainwreck Liverpool build comes to Life!

I think one cathode resistor generates more 2nd harmonics -- yeah!!!
by keewee
Sun Jun 12, 2016 4:44 pm
Forum: Trainwreck Discussion
Topic: 1K/25W
Replies: 9
Views: 2812

Re: 1K/25W

yea, they run hot those rockets heat sinking is good idea !!
by keewee
Sat Aug 30, 2014 3:14 pm
Forum: Fender Discussion
Topic: test for output transformer
Replies: 17
Views: 3479

Re: test for output transformer

Thanks for all the help everyone, I'm kind of embarrassed to say I found the problem. Instead of using the usual 12A switchcraft phone jacks I used the RadioShack closed circuit ones I already had in my drawer, I forgot why they were still there, the pinout is different and I remembered having this ...
by keewee
Sun Aug 24, 2014 11:34 pm
Forum: Fender Discussion
Topic: test for output transformer
Replies: 17
Views: 3479

Re: test for output transformer

Thanks I'll give it go, good idea. Thanks
by keewee
Sun Aug 24, 2014 2:08 pm
Forum: Fender Discussion
Topic: test for output transformer
Replies: 17
Views: 3479

Re: test for output transformer

tried what you suggested to test the pi output, nothing. I wish my scope still worked so I could signal trace. I never had an amp that made zero noise. I think I better start looking for a scope. The output transformer should still work without the ultra linear leads attached (blu/wht, brn/wht)? tha...
by keewee
Sun Aug 24, 2014 5:16 am
Forum: Fender Discussion
Topic: test for output transformer
Replies: 17
Views: 3479

test for output transformer

Just built a deluxe reverb, voltages look fine but absolutely dead quiet, I think I might have bad output transformer. Its an ultra linear type but I'm just using the brown and blue on the primary reading (40 ohms , 20 ohms to center tap). On the secondary I'm reading 1.5 Ohms (8 ohm tap).these valu...
by keewee
Sun Aug 03, 2014 3:28 pm
Forum: Fender Discussion
Topic: cabinet plans
Replies: 8
Views: 3421

Re: cabinet plans

Thanks fellas, I sure appreciate all the help, now I have all the info I need. I will for sure post my finished product. Knowing we all had a hand in this project.
by keewee
Sun Aug 03, 2014 1:08 am
Forum: Fender Discussion
Topic: cabinet plans
Replies: 8
Views: 3421

Re: cabinet plans

Wow, well excuse me, I though maybe this was similar to the trainwreck site!
by keewee
Fri Aug 01, 2014 2:04 am
Forum: Fender Discussion
Topic: cabinet plans
Replies: 8
Views: 3421

cabinet plans

Hey does anyone know where I might find some deluxe reverb combo cabinet plans? I found some for $15.00 free is better. Thanks!
by keewee
Thu Sep 12, 2013 11:36 pm
Forum: Trainwreck Discussion
Topic: Swirl/Shoosh in 4-4-0
Replies: 2
Views: 1302

Re: Swirl/Shoosh in 4-4-0

on the express as your note decays your power supply noise will increase with no master volume. I would look at Supply caps. Solen are big but work nice as supply caps ad a choke as a pi filter. The express is an extremely sensitive circuit, no grid stoppers, or any attenuation everything matters. T...
by keewee
Sat Mar 30, 2013 8:29 pm
Forum: Trainwreck Discussion
Topic: Rocket Issues
Replies: 16
Views: 2532

Re: Rocket Issues

If you like experimenting, try a 680r cathode bias in the ltpi instead of 1k2 . This warms the bias up. Also use 10k to 47k grid stoppers in el84's , this will smooth the distortion a bit, if you like to dime it, a solid state rect. help with any sagging. I guess Brian May adds a Large choke before ...