Playback equalizer calibration

[frpe12]

Hi all,

I searched in the different topics, but couldn't find any post about playback equalizer calibration, using R13 and R14 trimmers on board G.
Could someone explain how to proceed for the different speeds ?

Thanks to all.

[mampfi]

The R13 and R14 trimmers on board G are used to adjust the equalisation for the 19 kHz speed in accordance with the standard.
The equalisation settings for the other speeds are switched via this setting using fixed values.

A measurement tape recorded in accordance with the standard, with a frequency response of up to 20 kHz at -20 dB, is required for this adjustment.

[frpe12]

Hi Mampfi,

Thanks for your quick answer.
Ok, so I just need to adjust the trimmers to get the expected level of the reference tape. Right ?

Kind regards

[mampfi]

No, the trimmers 13 & 14 (the upper ones) are for playback frequency response only.
If you want to adjust the reproduce level, you have to use the trimmers 53 & 54. (The lower ones of board G)

[frpe12]

Yes, I was referring to R13 and R14 for frequency response. What is the procedure to adjust them ?
I already adjust R53 and R54.