: I been readin as much as I can about modulation reactors... and I am going : to try to use a common inductor in place of one...
it's the same thing. A fixed value Choke - something like 40 or 50 Henries at *at least* the current you're drawing in the final tank circuit. : I have one huge inductor that is about twice the size of the VM3 mod iron : I plan to use... I'm not sure of its inductance... I think it may be : 'high' current but got to check... I don't have such "big" iron around here, but several smaller chokes (10Hy @ 500mA type) that I'll be stringing together, at right angles to each other to make up 50 or so Hy at 400mA (I think the smallest I'll be using only has a max of 400mA @ 20Hy) : I also have more mod iron laying around... possibly use a mod tranny for a : reactor???? And, just in case you're not sure how to connect it, I tie one end of the modulation transformer (that WAS going to the B+ supply) to ground. The other side is connected to a large capacitor (5uf @ 5kV) on the Final side of the B+ line to the final. So, from the B+ supply, attach to one side of the choke, the capacitor to the other side, that's connects to the mod xfmr and then B+ from the choke to the final. This shunts the DC off of the secondary of the modulation transformer, allows the transformer to react more linearly, and prevents core saturation on the secondary of the modulation transformer. More Core in the transformer = broader range of frequencies, generally speaking. : Any ideas on the ins and outs would be appeciated... : : I'm going to finish this rig if it kills me... or drives me crazier than : I already am... heeheeheehee hope that helps. 73 = Best Regards, -=Jeff/W5OMR=-
