image dump...
Freed 38166 Lang PEQ Transformer
- Thread starter CJ
- Start date
Help Support GroupDIY Audio Forum:
you say you want more? well here's more...
first layer unwind, so flip it over to wind, that will be your starting margin,
looks like 277t 277t 480 t , repeat for coil b and hook them up balanced.
there is a wire screen (you use mag wire instead of foil, less loss on high end) between pri/sec
c core is 1 inch strip, probably 4 mil, grain, 3/8 build, 1 9/16" x 5/8" window
e f g h are the core dims. ask any xfmr guy about e f g h and they speak the same lingo,
so you guys learn your e f g h window dims for c cores, will ya?
print up manana...
first layer unwind, so flip it over to wind, that will be your starting margin,
looks like 277t 277t 480 t , repeat for coil b and hook them up balanced.
there is a wire screen (you use mag wire instead of foil, less loss on high end) between pri/sec
c core is 1 inch strip, probably 4 mil, grain, 3/8 build, 1 9/16" x 5/8" window
e f g h are the core dims. ask any xfmr guy about e f g h and they speak the same lingo,
so you guys learn your e f g h window dims for c cores, will ya?
print up manana...
Biasrocks
Well-known member
drpat said:
These drawings were passed to me from a reliable source. I've have never verified the schematic of the filter section myself.
Perhaps we should try to do this. ???
You're welcome.
Beautiful sounding EQ's.
Mark
okgb
Well-known member
you're going to have to do something custom about the inductor
anyway if you're building a Lange ?
Hey Cj , have you dared , is the time right
to Hack the 217-D ? [ yeah i don't got one ]
WTF over ?
anyway if you're building a Lange ?
Hey Cj , have you dared , is the time right
to Hack the 217-D ? [ yeah i don't got one ]
WTF over ?
this is the output that i am hacking,
looking for an input on evilbay , any year now...
Pat has a 217 D but we already have enuff info to build one, maybe i will build one and send it to Pat to do a side by side.
was that Igor that provided that Lang filter section?
looking for an input on evilbay , any year now...
Pat has a 217 D but we already have enuff info to build one, maybe i will build one and send it to Pat to do a side by side.
was that Igor that provided that Lang filter section?
Biasrocks
Well-known member
CJ said:
No, I've had these kicking around for quite some time.
Mark
Biasrocks
Well-known member
drpat said:
Sorry Pat, no idea.
I'm curious, do they correspond to any Pultec filter section that we know of? That would help to solve the problem.
It doesn't look to match the EQP-1A.
Perhaps some surgery is in order.
Mark
rascalseven
Well-known member
Sorry for the OT, but looking at the PEQ-2 and PEQ-2A schematics, the output amps are different. The "2" is simpler than the "2A", and the 33vdc is coupled differently. Anyone had the opportunity to compare the sound of these circuits? I'm curious to know the difference.
PEQ-2:
PEQ-2A:
Also, CJ, how much DC could the primaries of that output iron handle, do you think?
JC
PEQ-2:
PEQ-2A:
Also, CJ, how much DC could the primaries of that output iron handle, do you think?
JC
I would not trust the schematics
PEQ-2 has the + going to + and ground, look at points A, B, D and K power supply looks to be drawn shorted
PEQ-2A again look at the power supply wiring
One would need to work out the rest of the schematic to make sure it is correct
PEQ-2 has the + going to + and ground, look at points A, B, D and K power supply looks to be drawn shorted
PEQ-2A again look at the power supply wiring
One would need to work out the rest of the schematic to make sure it is correct
Biasrocks
Well-known member
A nice Peq-2 just went on Ebay.
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300365426990&ssPageName=h:h:alt:3&autorefresh=true
Still a bargain compared to the Pultec equivalent.
Went up almost $1K in the minute.
Mark
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=300365426990&ssPageName=h:h:alt:3&autorefresh=true
Still a bargain compared to the Pultec equivalent.
Went up almost $1K in the minute.
Mark
jetbat
New member
Hi. I know this is an old thread but it has very useful and rare information. It does not seem that anyone has tried to build this transformer and I was thinking about giving it a go. One bit of information that seems to be missing is the AWG of the primary and secondary magnet wire. I was wondering if CJ still had this information?
i bet we can get close with some dcr calcs, hold on...
jetbat
New member
Thank you.
Also there is a wire screen between the primary and secondary. Could AWG on that be figure? Is the screen winding a single layer wound tight and neat like the pictures? Is that screen grounded on one end only or both ends?
Anything you can remember is appreciated.
Also there is a wire screen between the primary and secondary. Could AWG on that be figure? Is the screen winding a single layer wound tight and neat like the pictures? Is that screen grounded on one end only or both ends?
Anything you can remember is appreciated.
screen wire grounded on one end only, you can use a layer of the smaller AWG used in the transformer
