|
Audio Asylum Thread Printer Get a view of an entire thread on one page |
For Sale Ads |
184.160.142.89
Hi
I have a Telefunken TT750 which have a deemphasis of 50us instead of 75us. Naturally, there's too much treble with this tuner. I looked at the LM4500 specs to know how o convert 50us to 75os. On the Telefunken schematic, I calculate 22us with a 4.7k and a 4700 pf cap. How to convert this to 75uS ? Is it really works at 22uS ?
Thanks
Follow Ups:
You have FL301 downstream that also has some sort of low pass roll off, and likely they have combined that with your 4700 pf / 4.7k to get 50us.
My best guess is to replace the 4700pf with 10,000 pf (.01uF) to get 75 us
Without knowing the components in the FL301 filters, you really have to use trial and error with measurements.
I have a Switchcraft Dolby FM compensator 25- 75 outboard switch . Would something like that work with what you need?
Post a Followup:
FAQ |
Post a Message! |
Forgot Password? |
|
||||||||||||||
|
This post is made possible by the generous support of people like you and our sponsors: