I am gathering parts and info about a Fairchild 660 project.
Found these transformers made by a company here in Italy , they are for the control amp output.
https://shop.piemme-elektra.it/Categories/339/Products/8134
https://shop.piemme-elektra.it/Products/7261
Two different ratios available, 5K/100 7:1 and 10K/600 4:1
I was wondering which one would be more appropriate.
Planning to use 6AQ5 tubes which should be very close to the 6V6 in the original.
There is an alternative from Sowter which is also 10K/600 4:1 but it's 4x times the price !!
Sowter also have a model for the control amp input which has a very high ratio 600/170K 1:17.
I remember seeing an older post where I believe CJ stated that a 1:10 would be fine, but I was wondering what could be the reason for Sowter choosing such a high step up ratio, is it because the extra gain from the transformer would put the threshold control in a more usable range ?
Found these transformers made by a company here in Italy , they are for the control amp output.
https://shop.piemme-elektra.it/Categories/339/Products/8134
https://shop.piemme-elektra.it/Products/7261
Two different ratios available, 5K/100 7:1 and 10K/600 4:1
I was wondering which one would be more appropriate.
Planning to use 6AQ5 tubes which should be very close to the 6V6 in the original.
There is an alternative from Sowter which is also 10K/600 4:1 but it's 4x times the price !!
Sowter also have a model for the control amp input which has a very high ratio 600/170K 1:17.
I remember seeing an older post where I believe CJ stated that a 1:10 would be fine, but I was wondering what could be the reason for Sowter choosing such a high step up ratio, is it because the extra gain from the transformer would put the threshold control in a more usable range ?
