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Old 6th March 2012, 11:15 PM   #121
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Quote:
Originally Posted by iNSuL View Post
Thanks. They're the driver b+ bypass cap. The 10uF
Yes, that's what I meant to say, 10uF. Can you tell a difference? There wasn't any B+ ripple to speak of with the originals.

I think I may also see Russian teflon coupling caps?

Also, did you end up staying with the 4V for the LED bias?

Last edited by scott17; 6th March 2012 at 11:24 PM.
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Old 7th March 2012, 12:11 AM   #122
iNSuL is offline iNSuL  United States
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Not much of a change, mainly put them in to keep with the pio theme. If there was any ripple there definitely isn't any now.The coupling caps are vitamin Q's, I really enjoy their sound, warmer tone. I kept the LEDs at 4 volt drop and changed rp1 to 30k(couldn't find a 27k). I really dig the clarity the LEDs added.
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Old 7th March 2012, 09:53 AM   #123
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LEDs are used but, has anyone tried for example 4x 1N4007 in series? Other types like Schottky?
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Old 12th March 2012, 11:27 AM   #124
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Based on posts that I have read, no personal experience, standard diode types such as 1N4007 tend to be noisier than LEDs. I believe I remember someone using a 1N4148 and commented that it was less noisy than others.

I installed LED bias in my test bench amp. I also installed a DPDT switch so I can switch between the LED and the original RC bias. (You must power-down for a few seconds before switching to avoid a pop that could damage some tweeters.) I used 2 green LEDs, in series, for 3.9V.

Initial impressions are a little more clarity (as if there wasn't already clarity) in instruments such as cymbals, snare, brass, woodwinds. For me it does seem subtle, but it is there. My loudspeakers are 97-98dB 1W/1m, with pro sound woofer and horn tweeter, so they are already very live sounding.

I've only had this mod installed for a couple of days, so more listening is in order.
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Old 12th March 2012, 11:42 AM   #125
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Just out of curiosity, as fas as I remember your speaker system was DIYed. have you posted some pictures anywhere on this forum? I would like to see them

Best regards!
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Old 27th March 2012, 06:52 AM   #126
gopib is offline gopib  India
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Originally Posted by regiregi22 View Post
Just out of curiosity, as fas as I remember your speaker system was DIYed. have you posted some pictures anywhere on this forum? I would like to see them

Best regards!
Post 21 I think...
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Old 27th March 2012, 02:49 PM   #127
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Post 21 I think...
Yes, and the floor standing version is shown in post 2021 here:
System Pictures & Description
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Old 3rd April 2012, 02:45 PM   #128
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Hello!
I am now a happy owner of one of this kits, and already have assembled it. First to say is that Scott is a great dealer, he always paid great attention during the delivering of the parcels from USA to Spain and customs procedure.
Due to the uncareful hands of the spanish postal service, the 6N1P tube came broken, despite the fact that it was properly packaged. Package of all items was explendid in fact (even my girlfriend asked me "where can I buy those little air bags and this brown paper? they looks awesome!" ha ha).
Scott kindly offered to send me a replacement tube without any additional charge, kudos!

Components quality is undoubtfully top notch, bypass capacitors are ELNA Silmic II, Dale resistors all around, pretty good quality coupling capacitors, excellent tubes, that's without speaking of the wonderful custom made power/output transformers and the oversized custom made too choke (quite big!). And BIG Panasonic film capacitors for power supply smoothing.

All of the connectors are top end quality, that's something I realized because almost all of them (including the volume knob) has been previously used by me in other projects, what means for me that he spent quite a time selecting the best options. The kit includes too a high end ALPS volume pot, quite pricey (20€!!).

Resuming, the most attractive fact of this kit is that, unlike other kits all around that have good quality in general but some components are a bit cheapie, the kit Scott offers is perfect in almost everysense, I cannot comment on any component that I would change. And that you have my word that Scott is far more implied in giving a good customer service than any other dealers I have met.

I will post some pictures soon...
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Old 3rd April 2012, 04:30 PM   #129
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Attached are the pictures of the items as they came, when I took them out of the packaging.

1-. Transformers covers

2-. Filter choke and power transformer

3-. Output transformers

4-. One day hanging around at IKEA I saw it.... that's what my brand new tube amplifier needs! A pair of handy handles! Aestetically pleasing metal CNC finish while giving a way to hold up the amplifier: only 4 at your nearest IKEA
Attached Images
File Type: jpg 1.jpg (135.7 KB, 645 views)
File Type: jpg 2.jpg (117.7 KB, 639 views)
File Type: jpg 3.jpg (95.5 KB, 628 views)
File Type: jpg 5.jpg (85.1 KB, 627 views)
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Old 3rd April 2012, 04:34 PM   #130
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Some pictures as I went through the assembly process. I tried to keep cabling as neat as possible, all cables apart from each other as much as possible, and a quite tight twisting on cables paired (specially if they carry AC).
Attached Images
File Type: jpg 4.jpg (259.4 KB, 633 views)
File Type: jpg 6.jpg (159.7 KB, 259 views)
File Type: jpg 7.jpg (351.1 KB, 275 views)
File Type: jpg 8.jpg (123.7 KB, 274 views)
File Type: jpg 9.jpg (243.9 KB, 301 views)
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