#11
|
|||
|
|||
John, you built THAT? You are a GOD! Wow. I'm consistently impressed by the horsepower of this group (and clearly the weakest link). Nicely done.
Nicely done. |
#12
|
|||
|
|||
Thanks!
You want to see something impressive, Google "833 Midlife Crisis" and click on images. That amp was my inspiration to build this and truly impressive, it's a 195wpc triode with only two tubes. Operating a tube at 2300volts is an engineering feat. |
#13
|
|||
|
|||
Built Matching Preamp this year
I finally completed my preamp to match the GM70 monoblocks after taking a break from audio for a year.
Thia scratch built 01A is a beautiful sounding preamp but very difficult to keep quiet. Circuit consists of a very simple design but with some modern power supply tricks. Instead of a choke, I used an electronic choke called a gyrator and heated the DHT filaments with Rod Colemans filament supplies very popular in the DIY market and probably licensed to some commercial manufacturers. Power supply is dead quiet using tube rectifier and Maida regulars. I purchased several tubes(globes) just to find a couple that were not microphonic. The ST tubes however are very quiet along with the 112a tube. My next mod is to remove the resistive pot at the input and install Dave Slagles AVC at the output of the preamp. This should definately bring this preamp to new levels. At unity gain, it will also give me about 600ohms out which is great news for driving longer cables. Also, at 140Henry, the bass is still very good according to my LTSpice model. As of now, this preamp smokes my Audio Research SP6, cant wait to hear it with the AVC! Last edited by deafbykhorns; 07-20-2018 at 08:22 AM. |
#14
|
||||
|
||||
John.......Great to see you post again. I thought you had fallen off the end of the Earth.
The new preamplifier looks superb. It may be time to begin building these amps and preamps for sale.
__________________
Dan STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A |
#15
|
|||
|
|||
Just busy with work, up to about 125 people on the payroll now.....
At this rate, retirement may come sooner than later. Took me a year to finish this pre-amp due to all the other hobbies, work, etc. Got a much bigger boat so doing some serious fishing and diving. Also going to the mountains a lot to mountain bike. I can tell you that manufacturers earn every penny. The amount of time that goes into R&D is insane. Another reason why many outsource to china but if you want a badass handmade amp/preamp, this is the way to go. I have owned many pieces of equipment over the years as you know and I may be a little biased but this setup smokes everything prior to this DIY system. I attribute most of it to the hand picked parts used and the custom OPT transformers using exotic materials. Will have more time when retirement comes |
#16
|
||||
|
||||
Boat anchor
Really nice to see some great diy work on the forum. Congrats on a fantastic build.
Tom
__________________
Main System: Amati Futura Mains Amati Homage VOX Center, Proac Response 1sc Rears, Three MC2301's for L,C,R MC 602 for the rears C 1100, MX 151, MCD 1100, MR 80 Nottingham Dais with Wave Mechanic Sumiko Palo Santos Presentation SurfacePro 3, RPi 4, ROON, WW Starlight Platinum USB, Schiit Yggdrasil, Benchmark DAC3 HGC MX 151, OppO BDP-95, JVC RS-500 DILA projector, 106" diagonal Stewart Luxus Screenwall Deluxe with Studiotek 130 G3 material. Lake House: Ohm F, MC 275V, C2300, MR 77, Rega P3 OnDeck: McIntosh MAC 4300v Last edited by W9TR; 07-20-2018 at 10:13 AM. |
#17
|
||||
|
||||
Quote:
Very nice work.
__________________
Glenn... Canton Reference 9 Clearaudio SM Pro Focal Bathys JLA 10" Dominion Kuzma Stabi S w/MC & MM Magnepan 1,7i McIntosh MA8950 & MR88 Oppo 203 Roon Nucleus Rose Hifi RS150B Shunyata Gemini-4 Sony ST-A6B, TA-F6B, ST-J75 & PS-X75 Sorane SA1.2 & TA-1L Stillpoints LP1v2 WW Pt, Au & Ag Last edited by Formerly YB-2; 12-02-2018 at 09:26 AM. |
#18
|
||||
|
||||
Hi John. Yes, very nicely done! I agree, a well-designed and executed DIY component will beat most commercial offerings and cost less. Plus all the satisfaction you get from it. As soon as I'm allowed, I can post pics of my latest creations.
|
#19
|
|||
|
|||
A mix of Monolith Magnetics and Dave Slagle (Intact Audio)
|
|
|
Audio Aficionado Sponsors | |