Collins 26U1 Peak Limiter Power Transformer

[opacheco]

Hi, 

Do someone knows what the power transformer used the Collins 26U1?

I have one without power transformer!
Thanks anticipated
Opacheco

 

[opacheco]

Any idea?

Opacheco.

 

[mjrippe]

From the manual...

 

[opacheco]

From the manual...

mjrippe,
Fantastic information!!...thanks a lot.

Do exist a specific Chicago Std. Transformer model for this Collins Psu?

opacheco.

 

[opacheco]

Any idea about the exact Chicago Transformer model?

Opacheco.

 

[CJ]

probably a custom p/n,

however, if you want to scour catalogs one page at a time, 


http://www.bunkerofdoom.com/xfm/

 

[opacheco]

probably a custom p/n,

however, if you want to scour catalogs one page at a time, 


http://www.bunkerofdoom.com/xfm/

CJ, that is amazing huge information!!

Let me to check them!....

Thanks a lot,
Opacheco

 

[opacheco]

I have dedicated some hours in order to looking for a Chicago Transformer for my 26U Collins  Compressor but look like the CJ link with Chicago transformers Manuals  don’t have a 150 v with 135 v tap plus 6.3 v, could somebody recommend one for the power transformer for this compressor?, I don’t know what the power is (watts) it  and the amps current neither!!

Thanks in advance!

Opacheco

 

[scott2000]

could somebody recommend one for the power transformer for this compressor?, I don’t know what the power is (watts) it  and the amps current neither!!

Looks like there is a section in the manual that has a bunch of test voltages.  Should be able to get a better picture of what this current draw looks like from these until someone chimes in.

I'm not too comfortable with understanding how doublers affect current yet so I wouldn't know what size could be used /or get by in this original supply circuit...... but it would be interesting to hear.

Good luck

 

[opacheco]

Looks like there is a section in the manual that has a bunch of test voltages.  Should be able to get a better picture of what this current draw looks like from these until someone chimes in.

I'm not too comfortable with understanding how doublers affect current yet so I wouldn't know what size could be used /or get by in this original supply circuit...... but it would be interesting to hear.

Good luck

scott200,
Right! but maybe someone with a original Collins 26U can help me readying the impress code on a real power transformer; maybe the real transformer has more information about the electric current and power printed on one of its faces!!

Thanks
Opacheco

 

[mjrippe]

Photo attached from SN: 131

 

[opacheco]

Photo attached from SN: 131

mjrippe, great pic!!...thanks a lot.

I have searched the power transformer with this information but found nothing, but after of some calculator use I found that all I need is a 6.3 Vac (CT)@ 3Amps with a 135Vac @ 0.5Amps winding !!

Do someone can remember any transformer with this power capacity?...

In other hand; I am thinking I could use a 270Vac @ 0.5Amps and a DIODE BRIDGE instance to original DOUBLER VOLTAGE configuration in the PSU, but I am not sure if this work appropriately without sound quality diminished ???....Any comments will be appreciate so much!

opacheco.

 

[opacheco]

Sorry but do anyone have an idea?

opacheco.

 

[scott2000]

What is the transformer you are considering?

 

[opacheco]

What is the transformer you are considering?

Scott2000,

I don’t have any transformer in mind, I am searching for one with the 6.3 CT, @ 3Amps but my doubt is the power(watts) for the high voltage winding (or the amperes(Amps) for the 135Vac.)...I have stimated 0.5 Amps for the 135 Vac but I am not absolutely sure of that!

Any comment about it will be appreciate so much.

Thanks
opacheco

 

[CJ]

first step is post a schematic,


photo resize>

 

[opacheco]

first step is post a schematic,


photo resize>

CJ, thanks for your response.

Here is it!
opacheco

 

[CJ]

this will work>

http://www.hammondmfg.com/pdf/EDB269AX.pdf

 

[emrr]

Everything anyone needs to know is there on the manual and schematic.  Both online. 

 

[opacheco]

Everything anyone needs to know is there on the manual and schematic.  Both online.

yes of course!...here is

http://www.steampoweredradio.com/pdf/collins/manuals/collins%2026u1%20peak%20limiting%20amplifier.pdf

Please comment about of use a complete bridge diodes rectifier in this unit because the 135Vac and 6.3Vac(CT) is no comun for!...this is instance the doubler of voltage for the 135Vac!

Thanks
opacheco