UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - 6BE6/EK90 vs 6CS6/EH90 as frequency mixer in Trio 9R59DE ?

G6Tanuki · 10th Nov 2019, 2:54 pm

That "Pullen" mixer circuit is familiar - I used it in my first 144MHz converter, downconverting to 14-16MHz. It worked well, and was a lot less-bothered by Band-II broadcast-breakthrough than a lot of other designs.

(Then I discovered hot-carrier-diode double-balanced-mixers which worked just fine without a RF-amp. But that's a story for another day)

10th Nov 2019, 2:54 pm	#25
G6Tanuki Dekatron Join Date: Apr 2012 Location: Wiltshire, UK. Posts: 13,995	Re: 6BE6/EK90 vs 6CS6/EH90 as frequency mixer in Trio 9R59DE ? That "Pullen" mixer circuit is familiar - I used it in my first 144MHz converter, downconverting to 14-16MHz. It worked well, and was a lot less-bothered by Band-II broadcast-breakthrough than a lot of other designs. (Then I discovered hot-carrier-diode double-balanced-mixers which worked just fine without a RF-amp. But that's a story for another day)