melcor aml-27 input transformer ratio???

[dude24man]

does anybody know what the ratio is on the input transformer of a melcor AML-27? thanks

 

[mitsos]

Do you have the schematic? It says 18dB which is about 1:8.
cheers!

 

[dude24man]

the input transformer has the numbers 400-20 on the top. do you have the original schematic? thanks mitsos
 

 

[mitsos]

Sorry, it's actually a MAP posted here.

http://groupdiy.com/index.php?topic=18895.0

He says it's the same though, just with phantom resistors, so I had it files under melcor.  Should be the same. One way to confirm, inject a known signal in it and measure the voltage output.

Also has the GME schematic there.  Seach the forum, there is lots of melcor stuff.

 

[dude24man]

nice, thanks again mitsos

 

[gar381]

Here is a reverse I did on my cards a lot of years ago..

http://groupdiy.com/index.php?topic=3808.msg92908#msg92908

Note that L1 and L2 are actually diodes.

GARY

 

[dude24man]

fantastic gar381! thanks arty

 

[dude24man]

gar381, have you tried the input transformer in parallel=higher ratio? does the 1731 work ok in this configuration?

 

[gar381]

http://groupdiy.com/index.php?topic=25604.msg384163#msg384163

This is a Melcor AML27 card bolted to a 500 sled.  Note the bottom switch 150/600.  This is a primary
series/parallel  switch.  I like the sound of parallel best.

Hope this helps

GARY

 

[dude24man]

Nice,  Is that, yellow and orange together for XLR pin 3?  red and brown together for XLR pin 2?  blue to 0V?  do you still need to use the 610 resistor? thanks gar

 

[dude24man]

oops! looks like yellow and red (edge conn 5 and 7)=XLR pin 3,  orange and brown (edge conn 6 and 8)= XLR pin 2?  Arty