G
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Holy crap :shock: .... I need more time for DIY... I'm damn jealous Rowan.
My Transformers
- Thread starter analag
- Start date
Help Support GroupDIY Audio Forum:
Cainester
Well-known member
wow
Good work Analag. It has inspired me to start working on my 670 copy again. If I can find it under the dust !!
I'm gonna turn it around and show a pic of the wiring soon.
A question was asked about the heater setup....the power tran has (7) secondaries (4) of which are heater windings (2) @ 5A and (2) @ 2A. So each section has it's own supply, center grounded. Keeping it all AC. The regulator has it's own transformer.
Thanks to the original schemo, I ended up building my first regulator with tubes in it. After looking at a few designs including some Tektronix stuff I soon realized these guys were starving the error amp just so they could use an high value plate resistor, so active loaded I went (conducting like low resistance while performing like very high resistance). The result....0.1mV ripple with only 2.2uF polyprop filtering the output. Very stable with good tracking.
analag
A question was asked about the heater setup....the power tran has (7) secondaries (4) of which are heater windings (2) @ 5A and (2) @ 2A. So each section has it's own supply, center grounded. Keeping it all AC. The regulator has it's own transformer.
Thanks to the original schemo, I ended up building my first regulator with tubes in it. After looking at a few designs including some Tektronix stuff I soon realized these guys were starving the error amp just so they could use an high value plate resistor, so active loaded I went (conducting like low resistance while performing like very high resistance). The result....0.1mV ripple with only 2.2uF polyprop filtering the output. Very stable with good tracking.
analag
Viitalahde
Well-known member
That thing looks ******* amazing. I'm not gonna be there any time soon..! :shock:
jdr
Active member
Beautiful, and Spectacular.
:thumb: :thumb:
:thumb: :thumb:
CJ
Well-known member
I'll take three of those!
What's the shipping weight?
:thumb:
What's the shipping weight?
:thumb:
radiance
Well-known member
Unbelievable :shock:
Having not checked this thread for only two days,...... then seeing this serious piece off DIY.
Are that really 29 tube sockets I'm counting?
Having not checked this thread for only two days,...... then seeing this serious piece off DIY.
Are that really 29 tube sockets I'm counting?
peter purpose
Well-known member
Rowan... you're a DGMM... beautiful creation... :thumb:
Kid Squid
Well-known member
Oh yes indeed :guinness:
Fair one :wink:
Fair one :wink:
enthalpystudios
Well-known member
come ON!
i'm trying to get work done over here, and i just stared at the pics on this thread for like 20 minutes.
awesome stuff dude
so wait now, how many db of (low distortion) GR are expecting this thing to hammer home?
i'm trying to get work done over here, and i just stared at the pics on this thread for like 20 minutes.
awesome stuff dude
so wait now, how many db of (low distortion) GR are expecting this thing to hammer home?
MikoKensington
Well-known member
[quote author="enthalpystudios"]come ON!
i'm trying to get work done over here, and i just stared at the pics on this thread for like 20 minutes.
awesome stuff dude
so wait now, how many db of (low distortion) GR are we expecting this thing to hammer home?[/quote]
I did some changes to the original schemo based on my experience with the 660 type I built recently....I will post the results.
Anyway I just installed all the tubes in this baby.... instant "space heater"
but it's a beautiful thing in the dark.
analag
i'm trying to get work done over here, and i just stared at the pics on this thread for like 20 minutes.
awesome stuff dude
so wait now, how many db of (low distortion) GR are we expecting this thing to hammer home?[/quote]
I did some changes to the original schemo based on my experience with the 660 type I built recently....I will post the results.
Anyway I just installed all the tubes in this baby.... instant "space heater"
but it's a beautiful thing in the dark.
analag
radiance
Well-known member
[quote author="analag"].... instant "space heater"
but it's a beautiful thing in the dark.
analag[/quote]
What about the electric bill?
How much curent does it draw?
Is this something you'll leave on 24/7 ?
but it's a beautiful thing in the dark.
analag[/quote]
What about the electric bill?
How much curent does it draw?
Is this something you'll leave on 24/7 ?
Analag
I like the way you have wired this particularly the buss wires across the vari mu stage. This has given me some ideas for tidying up the wiring for my 670 copy.
You can see a couple of pics here, although I have done a bit more wiring since these were taken.
http://www.ashrec.com/new_page_1.htm
The biggest problem is having to shelve it when some paying work comes in, & then spending a load of time trying to bring myself back up to speed when I start it again.
I like the way you have wired this particularly the buss wires across the vari mu stage. This has given me some ideas for tidying up the wiring for my 670 copy.
You can see a couple of pics here, although I have done a bit more wiring since these were taken.
http://www.ashrec.com/new_page_1.htm
The biggest problem is having to shelve it when some paying work comes in, & then spending a load of time trying to bring myself back up to speed when I start it again.
