Klark teknik KT-2A mod HF compression

[mattenylander]

Hi!
I recently bought a Klark teknik KT-2A and found out that it compresses mainly the highs with its peak at around 8Khz when I do a frequency sweep even when the emphasis knob is set to flat with about 8dB-10dB of compression. My understanding is that the LA-2A doesn’t compress/ have the same ratio across the spectrum from the start but…
Then I read that:

In an LA-2A
“C4 adjusts the high frequency response of the entire unit and you really can adjust it a lot!

C14 in combination with R23 adjusts the hf response of the compressor side chain circuit.”

So I was wondering if someone knows if:
1. I could change the C14 value in the KT-2A as well to reduce the hf response of the compressors side chain? To make it compress more “flat”?

2. My understanding is that the C14 in the LA-2A is a variable/trimmer cap, but the only trimmers I see in the KT-2A are the, VR1,VR2 and VR3 but I suspect these are not variable/trimmer caps?

 

[radardoug]

RTFM! Your unit has a pre emphasis trimmer which needs to be adjusted to the flat position.

 

[mattenylander]

RTFM! Your unit has a pre emphasis trimmer which needs to be adjusted to the flat position.

Hi, as I wrote in my post… I get this response even when the emphasis is set to flat.

 

[radardoug]

Then the cap may be faulty or the shaft is not turning. Trimmer shaft is on left of front panel, check behind the panel.

 

[mattenylander]

Yeah I’m wondering if somehow the emphasis trim pots “flat” position isn’t “zero” so to say, I’m not sure how much that pot is supposed to read when set to flat but I’ll measure it and see what it reads.