[fach jeremy]

Hello everyone

I recently buying 2 x TS500 for working on stereo mix. I know it would be impossible to have a perfect EQ shape between the two, but i think there is a problem on one of them. Especially the high end (start at 1k)
I can post my mesure. I run a sweep at -16dbfs with REQ. My converters are Lynx AUrora 16.

Setup for TS500 was :

15''
Tape sat : middle
BIas/EQ : Flat

Max Input level : Last yellow LED on


Do you have an idea what's going on? I can't use them in stereo... So sad... i love them so much.

Thank you so much for your help.
Best regards
Jeremy

[JPK]

If you could compare the 2 signals on TP1, TP2, TP3, TP4, TP5, TP6 it would give us a clue about the stage where the issue starts.

[fach jeremy]

 thanks you JPK.

Do you think the ''testing Procedure''  that you made for check the unit  is enough ? Or i need to find an oscilloscope ? 

Best regards

[JPK]

The difference is big in the high frequencies so you could try with a 5kHz sine at the input and check the level at the different TP's with a DMM.

[fach jeremy]

Thanks you very much JPK.

Here is my results :  

[fach jeremy]

Ouch... sorry for the size

[fach jeremy]

Maybe it's interesting, i mesured the units in byPass and look what's going on.
Green = UNIT 1 RED = UNIT 2

[JPK]

Yes good finding.
Check the values of C1 (470pF marked 471), C2 (470pF), C54 (47pF marked 470), C64 (47 pF), C65 (47pF).