For those that may find a use for them: I've cleaned up the area of interest to amateurs of the YC156 constant current curves and posted both that and an "expanded" version: Entire page, with graph r
No real bravery here... I'm only going to have around 4100V on the plate, so most of that chart will be undiscovered country for me. :-) 73, Jim N7CXI _______________________________________________
I'm getting ready to lay out the HV rectifier board for my YC156 project, and it occurs to me to wonder if anyone has ever really heard HV rectifier "white noise" in the receiver? It would be simpler
Thanks, Ken. You're right about using the resistors to equalize the drops across the older diodes, and (in some cases) the filter caps. In this case, though, it's just about something I heard from Bi
Aha - Now that makes sense. I wonder if Orr possibly just assumed the noise was from the diodes? At this point we probably won't ever know. In most cases these days (and certainly in this case) the t
Thanks to all for the good ideas, guys. Carl's suggestion of putting 4700pf across each leg is one of those elegant ones... The point of overbuilding (in this case with a YC156) is long-term reliabil
I just bought a number of .01uF 6KV discs from an OM in China, but after receiving completely unmarked units, I'm not going to assume anything until after I get my hipot working... 73, Jim N7CXI ____
I ordered a new plate and filament transformer for my YC156 project from Jeff Weinberg at Harbach Electronics. He called tonight to tell me that they were shipping, and in conversation mentioned that
All these YC156 references are giving me a tic, and I'm not even a contester. (except maybe Field Day, oh boy) I'm just tired of frying commercial amplifiers running AM, SSTV and RTTY at perfectly le
Dave, Everyone's "through the nose" threshold is different, but if it's any help I just bought two EBM-PAPST G2E108-AA05 diecast aluminum case, ball-bearing 91 CFM 54db blowers from Newark for $150.5
There's also the ARRL "RF Amplifier Classics" book, which is a compendium of QST and handbook designs for HF, VHF and UHF. 73, Jim N7CXI _______________________________________________ Amps mailing l
The datasheet for the 108mm flange EBM-Papst blowers suggests that you can switch between different value run capacitors for speed control. I wonder if anyone's tried that? It applies to the 91 CFM u
Henry radio has been selling some Florida RF attenuators on fleaBay for reasonable prices. http://cgi.ebay.com/New-50-Watt-Hybrid-30-dB-50-ohm-Attenuator-/390115387682?pt=LH_DefaultDomain_0&hash=item
So does mine... I'm not quite that silly, tho. :-) 73, Jim N7CXI _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amp
The relays and anything else that makes a chirp, burp or crunch when you key up is critical to AM operation. I run legal-limit AM with my Flex-5000A and an 8877, but while everyone loves the audio I
Neither did the 3KA. 73, Jim N7CXI _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps