Search found 18 matches

by koffee_iv
Fri Feb 06, 2009 5:58 am
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Re: Freq response

I have swept several amps that I used the Hammond 1600 series output transformers in. They are wonderful! Below is a link to their specs. It seems to me that the 3db down point is below 20 hz. It will even pass 10 hz with a fairly respectable waveform, but with lower volume. The high end is maybe u...
by koffee_iv
Thu Feb 05, 2009 3:27 am
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Re: more answers

so do you get the correct amount of low end with punch if you have a 4x8" cab coupled with a 1x15" or 2x15"? koffee_IV: I play cello and bass in a church band, and in a rock band. I've owned/operated a tube amp repair business for over 25 years. I also build custom tube gear too, but repairs have a...
by koffee_iv
Sun Feb 01, 2009 7:53 am
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Re: reply to monster bass questions

I'll be able to post some clips before too long. With work, family, band and church, I stay busy. Thanks Stubby. I understand on the responsibilities. I'll not be able to check replies till the end of the week since I'll be gone working. Are you in a church band? My family plays in churches whereve...
by koffee_iv
Sat Jan 31, 2009 7:48 pm
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Re: monster bass

A while back I built a "monster bass" head. I used four KT88's for about 200 watts of pure tone. The output transformer was a behemoth 30 pound Hammond Hi-Fi transformer that could go down to 20 hz at full power! I also used a toroid power transformer. The front end was similar to a Marshall super ...
by koffee_iv
Fri Jan 30, 2009 3:55 am
Forum: Trainwreck Discussion
Topic: What Would Ken F Do?
Replies: 22
Views: 4993

More questions

I noticed on Dave Funk's website his TW pic showed less twists in the leads on V2 compared to some of the other builds here. Is there a reason for it? When Ken F. setup or tuned an amp, did he change values on some components or just rout the leads a little different.... turn a tranny??? what kind o...
by koffee_iv
Fri Jan 23, 2009 4:36 pm
Forum: Trainwreck Discussion
Topic: Introducing Myself
Replies: 11
Views: 2125

Re: Introducing Myself

Combine a committee and engineering, you'll get a mutant jackass from yer petri dish, a mule on the hindquarters, a sow up the middle complete with engorged pig nipples, a komodo dragon at the head. Musicians know what they want but they're frequently not aware of what does and doesn't work well to...
by koffee_iv
Fri Jan 23, 2009 5:07 am
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Re: Vintage tube Bass amp Question

The problem is you will need a road crew or back surgery, 'cause they all weigh a ton. The tried and true standard is the SVT, which clocks in around 85 lbs I think. While I am building a Hiwatt DR201 style amp for my GF, and she's into downtuned overdriven stoner metal, for maximum clean thump I'd...
by koffee_iv
Fri Jan 23, 2009 4:45 am
Forum: Technical Discussion
Topic: Vintage tube Bass amp Question
Replies: 24
Views: 5615

Vintage tube Bass amp Question

Are vintage tube bass amps able to deliver thunder down in a very low hz range for low tunings?

If so which ones?

Thanks
by koffee_iv
Fri Jan 23, 2009 4:38 am
Forum: Trainwreck Discussion
Topic: Yellowjackets? Convert EL34 to EL84
Replies: 0
Views: 42650

Yellowjackets? Convert EL34 to EL84

Has anyone tried this in your TW? What was the outcome?
by koffee_iv
Fri Jan 23, 2009 4:17 am
Forum: Trainwreck Discussion
Topic: Mil Spec PEC pots?
Replies: 32
Views: 16506

Carbo Comp? Carbon Film? or Metal Film?

Carbo Comp? Carbon Film? or Metal Film?

Are there prefrences?
by koffee_iv
Fri Jan 23, 2009 3:55 am
Forum: Trainwreck Discussion
Topic: Mil Spec PEC pots?
Replies: 32
Views: 16506

Re: Mil Spec PEC pots?

Thanks. Just me and the kids!
by koffee_iv
Fri Jan 23, 2009 3:48 am
Forum: Trainwreck Discussion
Topic: TW with Effects loop????
Replies: 19
Views: 4355

TW with Effects loop????

Are there con's to installing an effects loop in the TW circut?

Is it transparent when not in use?

Does being tube buffered make a large difference?
by koffee_iv
Thu Jan 22, 2009 7:46 pm
Forum: Trainwreck Discussion
Topic: What Would Ken F Do?
Replies: 22
Views: 4993

Re: What Would Ken F Do?

I see the pages at angelas instruments.
by koffee_iv
Thu Jan 22, 2009 7:44 pm
Forum: Trainwreck Discussion
Topic: What Would Ken F Do?
Replies: 22
Views: 4993

Re: What Would Ken F Do?

Structo wrote:He does talk in depth about why he chose a lot of things but some seem to think that he was having fun at our expense on a lot of them. :wink:
You mean like deliberately misleading?


Dennis
by koffee_iv
Thu Jan 22, 2009 5:29 pm
Forum: Trainwreck Discussion
Topic: What Would Ken F Do?
Replies: 22
Views: 4993

What Would Ken F Do?

Did Ken use the various components of his Twrecks because they were: 1. the best bang for buck? 2. the best components for that aspect of the amp? 3. what he had there on his bench available to use? 4. suitable with no opinion one way or the other? In regard to board material, resistor composition, ...