Hi i have two solid state replacement assemblies that fit the 4 pin socket of a 3B28 rectifier (as the type used in the Collins 30S1). They are cylidrical, black, and about 1+1/8" in diamter. They ha
I am sure grateful for the back and forths and hair splitting replies on this subject of grid regulated (or lack of) power supplies. I don't know if anyone is keeping the score here, but Richard is r
Bill wrote: *IMD is caused by the odd order terms of the polynomial ( output voltage/input voltage) of a device. The harmonics of these can terms ( 3rd, 5th etc harmonics) can easily be filtered but
Bill, I found you attatchment, thanks for sending it. There is nothing wrong in using the binomial expansion in representing a switch function. The binomail will include the terms of the taylor expan
Bill, It's time to change the subject title...to "How are IMDs created". Adding a filter after a nonlinear process such as a mixer, will do no good since the IMD has already been generated by the non
Bill are you then saying that the 3rd order IMD products are no longer: 2F2-F1 and 2F1-F2. 2F2 is the second harmonic of F2 and the same with F1. So how do you reconcile this? chris IMDs)". _________
Bill, I am not sure a single taylor series expansion can apply for your mixing case. Ideal mixing is based on multiplication, but let's skip this case because it seldom applies, other than in a Gilbe
While overhauling the my 30S-1, I noticed the amp has no rf choke in the filament/cathode circuit. The cathode/filament is connected directly to the filament wires. I find this unsuall since the fila
Does anyone know if in the past the 30S-1 Collins has been converted to 160m? I would like to compare notes. tnx 73s chris kb3bf _______________________________________________ Amps mailing list Amps
Hi, I added another 90microH mounted orthogonally to the existing (also 90microH) when modifying my 30S-1 for 160m. The unmofidied amp calls for 1.5nF 6KV bypass after the (original) RF choke. I moun
I figured it out! After looking at the problem and using admittances it became obvious why it works. The rf choke and bypass cap are part of the plate susceptance and the pi network with the higher L
I figured it out! After looking at the problem and using admittances it became obvious why it works. The rf choke and bypass cap are part of the plate susceptance and the pi network with the higher L