Gentner Audio-metrics Tp84

[stephane RAME]

I'm looking for documentation on this phono preamp.
Best regards.
Stéphane

[Earl K]

Hi Stéphane,
- A few years ago, the Gentner company morphed into http://www.clearone.com/img/nav_logo.gif (http://www.clearone.com) .
- Then they sold some of the legacy telephony/audio products to their competitors .

- This was unfortunate for a few reasons , one being that Gentner used to maintain online pdfs for all their products ( current and/or obsolete ) .

- http://www.comrex.com/assets/css/comrex_logo.jpg (http://www.comrex.com/products/couplers.htm) bought some of the older product line .

<> Earl

[stephane RAME]

Hi,
Thank you for the information.
I did not find anything.
On this link there is documentation AUDIOMETRICS
http://www.radiosystems.com/technotes.html
But not on the PT-84
Stéphane

[Earl K]

Hi Stéphane,

- I wouldn't be too surprised if that TP84 shares circuit values with this schematic (http://www.radiosystems.com/PDF/turntablepreamp-man.pdf) ( from the radiosystems web-site) .

- Simply by comparing the circuit layout shown on the pdf ( as well as some of the relevant IC types in the schematic ) , you'll know if they are one & the same .

<> cheers

[stephane RAME]

The input transistors are not the same
CA3054 vs LM394CH
Stéphane

[jcrobso]

This preamp was used in the turntable days, gave a balanced line out to go into the radio mixer. Hm, I wound it if I have any of them back in the storage closit?:hmm: