Search found 248 matches

by rowuk
Fri Sep 14, 2018 9:05 pm
Forum: Everyones Projects
Topic: PCL86 SE Ultralinear Monos
Replies: 47
Views: 2309

Re: PCL86 SE Ultralinear Monos

Did this project ever get off of the ground? I am looking for a dedicated single ended pentode tweeter amplifier with only a watt or two.
by rowuk
Fri Sep 14, 2018 9:01 pm
Forum: Valves
Topic: The Humble EL34
Replies: 33
Views: 5215

Re: The Humble EL34

My low frequency single ended pentode is doing a GREAT job. I do not use tube rectification in the PS however. I really like what the RH amplifiers do with the best diodes. The cheapest magic that I know of is the RH84 and that just much bigger is the RH Universal with EL34 (which I like much better...
by rowuk
Fri Sep 14, 2018 8:53 pm
Forum: Speakers
Topic: Speakers Feedback
Replies: 1
Views: 288

Re: Speakers Feedback

David Hafler had an excellent set up for using 2 speakers to generate a surround channel out of normal stereo. The positive lead went to positive on the amplifier, the negative leads from both speakers were connected together. This created a L-R and a R-L difference channel. In case the surround spe...
by rowuk
Mon Jan 29, 2018 5:23 pm
Forum: Speakers
Topic: Audax HD-3P coupled to a ESL57 as a Tweeter.
Replies: 8
Views: 1690

Re: Audax HD-3P coupled to a ESL57 as a Tweeter.

The ESL-57 is good to about 12K where it becomes very directional. It dies after 15K. The ESL is so smooth at the top however, that a "lesser" supertweeter will make things worse. The Kelly/Decca ribbon was almost a perfect match back in the day. I would prefer a ribbon or good magnestat to any othe...
by rowuk
Mon Jan 29, 2018 5:18 pm
Forum: Speakers
Topic: Interesting ribbon
Replies: 7
Views: 1367

Re: Interesting ribbon

I think that the AMTs sound pretty "grey" in tone. Kind of like BMS ceramic magnet drivers for horns. I used to have stacked Quads with the Kelly/Decca ribbon tweeter. Never had any issues above 10K!
by rowuk
Mon Jan 29, 2018 5:13 pm
Forum: Speakers
Topic: Something Stirs in the Workshop
Replies: 43
Views: 3976

Re: Something Stirs in the Workshop

This is absolutely beautiful. I have been thinking about a wooden elliptical 150 Hz horn for the same reason - vertical integration. This moves my motivation to 100%. Great job!
by rowuk
Sat Jan 27, 2018 7:46 pm
Forum: Everyones Projects
Topic: 3W amps - options: SS which sounds as good as DHT’s
Replies: 36
Views: 3897

Re: 3W amps - options: SS which sounds as good as DHT’s

I built some large speakers using Carver mid/hi ribbons and a 12" acoustic suspension woofer. The B&O ice amps ended up being the amplification of choice. 2x 90 Watts with BALLS and FINESSE. I would have had to build at least 50W valve amps for the ribbons - with the compromise of PP. The Ice amplif...
by rowuk
Wed Nov 15, 2017 9:32 pm
Forum: Speakers
Topic: This phase thing
Replies: 73
Views: 9100

Re: This phase thing

Our entire sense of direction and distance is based on phase. A human has great ability to compensate for serious errors in frequency response (ever wonder why 6" open back speakers get such good press?), but has no mechanism for phase. That means we can compensate for the frequency response error w...
by rowuk
Wed Jul 12, 2017 8:47 pm
Forum: Valves
Topic: The Humble EL34
Replies: 33
Views: 5215

Re: The Humble EL34

After great success with the RH307 Super and the RH84 Mk2, the RH34 will be my next not so humble LF SEP channel http://3.bp.blogspot.com/-P4YdPtv5h90/UaMrR4mBwkI/AAAAAAAAAEg/A5kkuRaaz8c/s1600/RH+Universal+rev2+corrected.jpg More info at: http://rh-amps.blogspot.de/2013/05/rh-universal-v2-totally-un...
by rowuk
Sun Feb 12, 2017 11:47 am
Forum: Everyones Projects
Topic: speed potentiometer id
Replies: 18
Views: 3209

Re: speed potentiometer id

I am pretty sure that you can't just replace the pot without further adjustment. Here is a website with manuals and schematics. This should get you much closer!

http://www.hifi-manuals.com/Pioneer
by rowuk
Sun Jan 29, 2017 4:31 pm
Forum: Valves
Topic: The Humble EL34
Replies: 33
Views: 5215

Re: The Humble EL34

The EL34 is not humble in my opinion. The problem is understanding how to interface it to the speaker. I really like simplicity of the Kitic design with this tube. It is like the big brother of the EL84. Transparent, great tone, stability of pitch and easy to get output transformers for. That all be...
by rowuk
Thu Jan 26, 2017 5:42 pm
Forum: CD
Topic: CD transport importance.
Replies: 11
Views: 2508

Re: CD transport importance.

I think that the most critical function is being able to read the disc in the first place. What good is a boutique transport when you can't listen to all of your discs.
by rowuk
Tue Jan 24, 2017 10:08 pm
Forum: Everyones Projects
Topic: Console Stereo Rebooted
Replies: 7
Views: 2680

Re: Console Stereo Rebooted

Image

A JBL Paragon fits this description very well...
by rowuk
Tue Jan 17, 2017 6:04 pm
Forum: Speakers
Topic: Doc Mods
Replies: 203
Views: 16860

Re: Doc Mods

It is always interesting when it gets ugly. Then you find out about the real qualities, and if they are worth paying attention to. In this case someone builds a speaker with easily definable flaws and trashes those that point it out. There is nothing wrong with empirical evidence - for ones own ears...
by rowuk
Tue Jan 03, 2017 8:31 pm
Forum: Everyones Projects
Topic: ROWUKs newest build
Replies: 4
Views: 1182

Re: ROWUKs newest build

AW3000. It is actually a very good subwoofer driver of reasonable efficiency (88dB W/Meter)with clean response to 500 Hz. Quiet paper cone. Perfect in this UseCase.