I have just made a point to point version of this circuit in a choc tin using a Oktava MK101 head with same capsule as MK219/319 for .....got all voltages correct so I think I have the 2N3819 biased correct Im using a OEP 1:1:6.45 transformer at moment tried couple others too...... mic doesnt sound bad but lots of back ground noise just general white noise cant work out why its so noisy Im sure it shouldnt be this noisy...... further investigation needed..... may try another capsule .....I didnt have a pair of 10M res for R5 & 6 so used 2x 12m2 shouldnt be causing my noise should it ..... as I say voltages all seem good got the 10V on the drain used a 10K trimmer + 1K on FET but needed to add another 3K so the FET would tune in to 10 Volts, but thats ok is it not ?
Thanks
Thanks