Tuesday, January 21, 2025

The Pleiades 2 K117 microphone preamp withh tiny input and output transformers did not record nice

At your risk. Possible reason is thye tiny transformers used which gave a frequency response resembling old telephone speech. This became very apparent after listening to a recording on the Pleiades 2N3053 power amplifier driving the Celestion Ditton 150 speakers. But the 2 JFETs class A preamp concept powered by a 9V battery and using input, output transformers and no negative feedback is promising as it can directly drive the Sennheiser hD-580 reference headphones to a good level direcly from a mic whispering signal. obvious remedy is to use larger studio quality input, output transformers, such as Jensen, Sowter, Aletc, etc. So some thought is given on how to fit all these on a small beautiful looking beige and brown colored Retex cosole box.

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