Hi all

I picked up a ADR rack with 2 F700 comps (early compex I guess) and 2
E800 EQs and in transit, all 4 transformers dropped out of the comps.
They are slot in"gardners" BUT I dont know which goes where as they
were loose. There are 2 varieties.
cat no MU 7524 pri 150/600 sec 600 CT
cat no mu 7530 pri 10k ct sec 10 k

A pic here to see what model it is!

http://users.tvcablenet.be/personal/...ctures/adr.JPG

Anyone have these comps or schematics and could look inside and see
which goes where???

Many thanks
David

David Morley wrote:

I picked up a ADR rack with 2 F700 comps (early compex I guess)
and 2 E800 EQs

I think this could be something to congratulate you with.

and in transit, all 4 transformers dropped out of the comps.
They are slot in"gardners" BUT I dont know which goes where
as they were loose. There are 2 varieties.
cat no MU 7524 pri 150/600 sec 600 CT
cat no mu 7530 pri 10k ct sec 10 k

One pair goes in one pair of devices, the other pair in the other, both
pairs are probably useds as 1:1 transformers, i.e. without voltage step
up or step down. That is what I would expect to apply if both pairs are
for the outputs. One of them is then a wiser choice than the other, but
it may have been about availability. IF one pair is for input and one
for output, then the 10k-10k is likely to be the one for input and the
150/600-600 the one for output. Someone may know me to be wrong, but
that is my guess.

A pic here to see what model it is!

http://users.tvcablenet.be/personal/...ctures/adr.JPG

Hmmm ... that's an oldie ...

Anyone have these comps or schematics and could look inside and see
which goes where???

It is imo only in hifi lore that there is a signal quality advantage in
using a transformer for short cable runs unless everything, electronics
included, is balanced. You could possibly have some esoteric grounding
issue that makes it relevant, but other than that I think you will get
the cleanest sound by finding a way to bypass the tranformers and use
unbalanced input and output. Read the manual for any equipment with
electronically balanced in- and outputs you want to use this 4-device
box in conjunction with.

Many thanks
David


Kind regards

Peter Larsen

--
*******************************************
* My site is at: http://www.muyiovatki.dk *
*******************************************

Many thanks Peter!
Useful info.
Cheers
david

Peter Larsen wrote in message ...
David Morley wrote:

I picked up a ADR rack with 2 F700 comps (early compex I guess)
and 2 E800 EQs

I think this could be something to congratulate you with.

and in transit, all 4 transformers dropped out of the comps.
They are slot in"gardners" BUT I dont know which goes where
as they were loose. There are 2 varieties.
cat no MU 7524 pri 150/600 sec 600 CT
cat no mu 7530 pri 10k ct sec 10 k

One pair goes in one pair of devices, the other pair in the other, both
pairs are probably useds as 1:1 transformers, i.e. without voltage step
up or step down. That is what I would expect to apply if both pairs are
for the outputs. One of them is then a wiser choice than the other, but
it may have been about availability. IF one pair is for input and one
for output, then the 10k-10k is likely to be the one for input and the
150/600-600 the one for output. Someone may know me to be wrong, but
that is my guess.

A pic here to see what model it is!

http://users.tvcablenet.be/personal/...ctures/adr.JPG

Hmmm ... that's an oldie ...

Anyone have these comps or schematics and could look inside and see
which goes where???

It is imo only in hifi lore that there is a signal quality advantage in
using a transformer for short cable runs unless everything, electronics
included, is balanced. You could possibly have some esoteric grounding
issue that makes it relevant, but other than that I think you will get
the cleanest sound by finding a way to bypass the tranformers and use
unbalanced input and output. Read the manual for any equipment with
electronically balanced in- and outputs you want to use this 4-device
box in conjunction with.

Many thanks
David


Kind regards

Peter Larsen

Many thanks Peter!
Useful info.
Cheers
david

Peter Larsen wrote in message ...
David Morley wrote:

I picked up a ADR rack with 2 F700 comps (early compex I guess)
and 2 E800 EQs

I think this could be something to congratulate you with.

and in transit, all 4 transformers dropped out of the comps.
They are slot in"gardners" BUT I dont know which goes where
as they were loose. There are 2 varieties.
cat no MU 7524 pri 150/600 sec 600 CT
cat no mu 7530 pri 10k ct sec 10 k

One pair goes in one pair of devices, the other pair in the other, both
pairs are probably useds as 1:1 transformers, i.e. without voltage step
up or step down. That is what I would expect to apply if both pairs are
for the outputs. One of them is then a wiser choice than the other, but
it may have been about availability. IF one pair is for input and one
for output, then the 10k-10k is likely to be the one for input and the
150/600-600 the one for output. Someone may know me to be wrong, but
that is my guess.

A pic here to see what model it is!

http://users.tvcablenet.be/personal/...ctures/adr.JPG

Hmmm ... that's an oldie ...

Anyone have these comps or schematics and could look inside and see
which goes where???

It is imo only in hifi lore that there is a signal quality advantage in
using a transformer for short cable runs unless everything, electronics
included, is balanced. You could possibly have some esoteric grounding
issue that makes it relevant, but other than that I think you will get
the cleanest sound by finding a way to bypass the tranformers and use
unbalanced input and output. Read the manual for any equipment with
electronically balanced in- and outputs you want to use this 4-device
box in conjunction with.

Many thanks
David


Kind regards

Peter Larsen