Search found 41 matches

by bb5000
Tue Dec 31, 2019 10:09 am
Forum: Technical Discussion
Topic: 300 watt output transformers
Replies: 12
Views: 1480

Re: 300 watt output transformers

There are a few options : From Italy, InMadOut : http://www.inmadout.com/T-output.asp From Tube-Town, Germany: https://www.tube-town.net/ttstore/tt-dr405-hiwatt-style-outputtransformer.html A few years ago when I built my Hiwatt DR201 clone, I contacted Heyboer and they could offer a Hiwatt replacem...
by bb5000
Wed Aug 29, 2018 7:04 pm
Forum: Technical Discussion
Topic: Need tips on using interstage transformer - phase inverter
Replies: 43
Views: 8605

Re: Need tips on using interstage transformer - phase inverter

Fender Musicmaster Bass Amp (Silverface), Fender PS300, Fender PS400 + lot of old radios from 30-50's.. Plus the ones mentioned in the previous post. I've built the Weber AB200 myself and used it for 8 years now.
by bb5000
Fri Sep 18, 2015 7:09 am
Forum: Technical Discussion
Topic: Phase Inverter Preference & Why?
Replies: 21
Views: 6546

Re: Phase Inverter Preference & Why?

My Weber AB200 has an interstage transformer driven by an EL34, the power amp is 6 x 6550.
by bb5000
Tue Sep 08, 2015 7:22 am
Forum: Vox/Hiwatt Discussion
Topic: Hiwatt preamp
Replies: 1
Views: 1705

Re: Hiwatt preamp

If you check hiwatt.org , you can see that there are no specific "DR504" preamps. The Hiwatt preamp was used in all models, and changed some over time + there were some custom preamps. I'm not sure which of the preamps the Reeves uses.

http://hiwatt.org/tech2.html
by bb5000
Wed Jul 08, 2015 5:53 am
Forum: Technical Discussion
Topic: PT Current Draw Page Gone
Replies: 34
Views: 5174

Re: PT Current Draw Page Gone

a Bridge rectifier option would be nice in addition to the full-wave.
by bb5000
Fri Jun 05, 2015 6:15 am
Forum: Vox/Hiwatt Discussion
Topic: HIWATT 400 - any queries?
Replies: 18
Views: 6043

Re: HIWATT 400 - any queries?

It should have a plate voltage ~700V if it's working as designed...That amp is a wet dream.
by bb5000
Fri Aug 15, 2014 8:15 am
Forum: Technical Discussion
Topic: Your top ten tube amp picks.
Replies: 46
Views: 13415

Re: Your top ten tube amp picks.

Based on amps played or "been on-stage with guitar player", I play mainly bass:

Bass amps:

1. Weber AB200
2. Hiwatt DR201
3. Ampeg SVT VR

Guitar amps:

1. AA864 Bassman
2. Hiwatt DR201
3. 6G6B Bassman
4. AB763 Bandmaster
5. JMP SuperLead Randy Rhoads
6. 6G3 Deluxe
7. AB763 Super Reverb
by bb5000
Sat Aug 09, 2014 7:14 pm
Forum: Technical Discussion
Topic: 4 x KT88 Bass amp ?
Replies: 44
Views: 6571

Re: 4 x KT88 Bass amp ?

Ok I'm starting to get it.So for this^^^, what are the output options? Would you go straight to the board? DI box inbetween? What options would balanced vs. unbalanced give you? i guess you could go to another power amp, but you're getting output tubes sent, as well If the line-out has the proper l...
by bb5000
Thu Aug 07, 2014 6:42 pm
Forum: Technical Discussion
Topic: 4 x KT88 Bass amp ?
Replies: 44
Views: 6571

Re: 4 x KT88 Bass amp ?

Ok so say I have a 50W Fender head, I've been running into a cab...standard fare head. I would want to : 1. Be able to run the amp by itself through a cab via it's speaker outs(done) 2. Bypass the amp's power section and run it through a separate SS power amp 3. Run the head through a cab, via it's...
by bb5000
Thu Aug 07, 2014 5:31 pm
Forum: Technical Discussion
Topic: 4 x KT88 Bass amp ?
Replies: 44
Views: 6571

Re: 4 x KT88 Bass amp ?

I built a Hiwatt DR201 clone in 2011, you should be able to get the correct transformers from Heyboer. The power supply is "dual-rail" using 2 bridge rectifiers so you will need a PT with 2 HV windings. Since I'm in Europe I ordered my transformers from TubeAmpDoctor in Germany, don't know where the...
by bb5000
Sat Feb 15, 2014 9:57 am
Forum: Technical Discussion
Topic: dryer heating element as a dummy load ??
Replies: 17
Views: 4693

Re: dryer heating element as a dummy load ??

I use 2 of these for either 8 ohm/300W or 4 ohm/600W

http://www.ebay.com.au/itm/8-ohm-300-Wa ... 1e689773a1
by bb5000
Fri Jan 24, 2014 7:54 am
Forum: Technical Discussion
Topic: Layout/Schematic drawing software
Replies: 9
Views: 4173

Re: Layout/Schematic drawing software

I use Visio for both schematics and layout
by bb5000
Sat Nov 09, 2013 8:50 am
Forum: Vox/Hiwatt Discussion
Topic: A high plate Hiwatt?
Replies: 9
Views: 4937

Re: A high plate Hiwatt?

The Hiwatt DR201 and DR405 runs with 700Vp and 400 Vg2, so I guess that that's how it would sound like. Hmm, I knew that the DR201 had a voltage doubler in the power supply but I didn't know the voltages were that high. Cool. So I could build a DR201 with 2 power tubes rather than 6. The KMD transf...
by bb5000
Fri Nov 08, 2013 8:31 am
Forum: Vox/Hiwatt Discussion
Topic: A high plate Hiwatt?
Replies: 9
Views: 4937

Re: A high plate Hiwatt?

The Hiwatt DR201 and DR405 runs with 700Vp and 400 Vg2, so I guess that that's how it would sound like.
by bb5000
Fri Sep 27, 2013 10:27 am
Forum: Vox/Hiwatt Discussion
Topic: Talk me out of a 100 watt Hiwatt build.......
Replies: 25
Views: 8898

Re: Talk me out of a 100 watt Hiwatt build.......

I am going with the Heyboer Hiwatt iron... I just wonder if 100 watts is a bit much.. but also agree that the 100 watt might be the definitive Hiwatt tone.. But then again, I am not necessarily out to make a replica... I am interested in any ideas on taming the brightness a bit.. warming things up ...