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11-02-2024, 04:08 PM
This 'Lark Guitar Amplifier' schematic is very similar to the Pepco or Pine manufactured version I have.
![[Image: pepco-pine-electronic-products-co-model-801-393478.jpg]](https://medias.audiofanzine.com/images/normal/pepco-pine-electronic-products-co-model-801-393478.jpg)
The challenge with the Herzog switching circuit in TUT3 is it's for a speaker 1/4" output jack and this amp has none - its wired internally to/from a terminal strip. I could drill a hole in the back panel, install a TRS and use long leads to/from the TRS to the terminal strip and the speaker - but I don't want to be that invasive.
I can't figure out how to use a TRS mounted on the top panel as a Herzog output jack, not to a speaker jack. The 150ohm attenuation resistor wired between the Herzog out jack and the wiper of the 1Ma Output Volume pot in parallel with the 10W 6R8 resistor to the output transformer 0 and 8ohm taps needs to be re-wired so the Ring disconnects the internal speaker, not the 6R8 pwr resistor - it's hard to explain without posting Kevin's pics from TUT3.
Thanks for your reply!
The challenge with the Herzog switching circuit in TUT3 is it's for a speaker 1/4" output jack and this amp has none - its wired internally to/from a terminal strip. I could drill a hole in the back panel, install a TRS and use long leads to/from the TRS to the terminal strip and the speaker - but I don't want to be that invasive.
I can't figure out how to use a TRS mounted on the top panel as a Herzog output jack, not to a speaker jack. The 150ohm attenuation resistor wired between the Herzog out jack and the wiper of the 1Ma Output Volume pot in parallel with the 10W 6R8 resistor to the output transformer 0 and 8ohm taps needs to be re-wired so the Ring disconnects the internal speaker, not the 6R8 pwr resistor - it's hard to explain without posting Kevin's pics from TUT3.
Thanks for your reply!
