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Search: Posts Made By: bevensee
Forum: WD Amplifiers 7th April 2014, 10:30 AM
Replies: 15
Views: 3,414
Posted By bevensee
Re: KT88 Transients seem improved without Pre 3 in circuit ??

To me it sounds perfectly plausible that if the DAC output is capable of driving teh KT88, nothig would be improved adding more (i.e. a pre) between them. It would not be the first time "less is...
Forum: WD Amplifiers 1st April 2014, 10:05 PM
Replies: 12
Views: 2,191
Posted By bevensee
Re: Blu tack to combat transformer buzz.

Yes I did mean toroidal. In Danish, they are called "ringkerne", so I suppose my mind just translated directly :D'oh!:

I was not aware that the mains tranny is an EI core, so thanks for clarifying.
Forum: WD Amplifiers 1st April 2014, 10:58 AM
Replies: 12
Views: 2,191
Posted By bevensee
Re: Blu tack to combat transformer buzz.

Buzzing ring-core transformers can be an indication of DC on the mains. This has the drawback of saturating the iron core, and thereby reducing the amplifier headroom and dynamics. So even though...
Forum: Wish List 25th February 2014, 09:49 PM
Replies: 14
Views: 8,053
Posted By bevensee
Re: WAD and WD schematics

Besides, a lot of this is really not that easy to find anymore. Especially not all the treasures some of us don\t even know exists.
Forum: Wish List 25th February 2014, 10:52 AM
Replies: 14
Views: 8,053
Posted By bevensee
Re: WAD and WD schematics

Still, a re-issue of the CD would be great. Perhaps as a payable download?
Forum: WD Amplifiers 24th February 2014, 09:07 AM
Replies: 19
Views: 3,382
Posted By bevensee
Re: One for the brains amongst us !

Just saw this old thread, and thought I'd chip in with a solution that worked for me when my Phono3 (MC) picked up hum from my power amps (they are now further away, so no problem anymore). I found...
Forum: WD Amplifiers 24th February 2014, 08:43 AM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Richard,

Yes it is interesting to get a better understanding of these things. I actually started reading the Morgan Jones book this weekend for the same reason :-). Thanks for the articles; they...
Forum: WD Amplifiers 23rd February 2014, 02:22 PM
Replies: 4
Views: 2,160
Posted By bevensee
Smile Re: kt88 and Martin Logan, any experience?

Hi Vitalstates,

Thanks for the comments. I am leaning more and more towards taking the plunge...
Forum: WD Amplifiers 23rd February 2014, 09:04 AM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Well, I didn't exactly make any calculation because I was a bit unsure of how to calculate the load. I therefore looked at the original diagram, and 0.022 is what you get in the middle position where...
Forum: Sources 22nd February 2014, 09:19 PM
Replies: 2
Views: 1,976
Posted By bevensee
Re: Phono 3 with 5751 valves

Congrat's Greg, and Yes, I totally agree. Jeff is brilliant. He send mine to Denmark, and it arrived nicely. The arm is a true giant slayer.
Forum: WD Amplifiers 22nd February 2014, 05:57 PM
Replies: 4
Views: 2,160
Posted By bevensee
Re: kt88 and Martin Logan, any experience?

Hi Justin,

Thanks for the suggestion. I will try PM'ing him.
Forum: Wish List 22nd February 2014, 04:52 PM
Replies: 52
Views: 12,434
Posted By bevensee
Re: 50 Watt amplifier

I just read this thread. I would be very interested, provided output impedance gets low enough to drive stats.

May I suggest to approach Noel Keywood? Maybe a feature in HiFi World could raise...
Forum: WD Amplifiers 22nd February 2014, 04:36 PM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Hi Richard, I will send you a PM with my e-mail. Thanks!

I thought the load was supposed to be calculated as the coupling parallel to the rest of the amp and not just the 1M?
Forum: WD Amplifiers 22nd February 2014, 03:04 PM
Replies: 4
Views: 2,160
Posted By bevensee
kt88 and Martin Logan, any experience?

Hi all,
I am considering building the kt88 amp to drive my Martin Logan Vantage speakers, but I am concerned that the inpedence drop to the 1-Ohm region at high frequencies will course a treble...
Forum: WD Amplifiers 22nd February 2014, 11:49 AM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Hi Richard, and thanks again for the advise. I have already added the first stage bypass caps, and I built it with GE 5157 from the beginning. The bypass caps are marvelous once settled!

I have no...
Forum: WD Amplifiers 21st February 2014, 06:53 PM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Hi Richard,

Thanks for the quick reply!

Is there anything gained in swapping to a different king of capacitor in that position? If so, can you give recommendations?

Thanks,

Jesper
Forum: WD Amplifiers 21st February 2014, 02:30 PM
Replies: 77
Views: 20,320
Posted By bevensee
Re: Phono 3 with 5751 valves

Sorry, but I don't get this. Can someone explain?
- R13/14 is not 1M
- I you use 0.1 uF into 1MOhm, cutoff is only 1.6 Hz

I guess my question is: If I want to get rid of the switch, and have...
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