Hi Rich, Trying to not split hairs here: I should have said "at the onset of observable leakage" in stead of simply "leakage". My definition of leakage is when it just begins to show some current on
Sets of Bristol wrenches are available from Max Gain Systems _www.mgs4u.com_ (http://www.mgs4u.com) . i purchased a set last summer and found them to be of good quality. 73/k5gw _____________________
With the 2700v/750ma you are getting almost 62% efficiency not counting feed through power. That is right in the ballpark of what would be expected. A lot of linear amps are not this good! How did th
Hi Mike, in answer to cold tuning the output network: The tube contributes a significant part of the total C1 value; for this reason, it needs to be in the circuit. If this causes a problem connectin
Hi Rich, here we go with the fly excrement in the pepper again! .The discussion was about in circuit adjusting a network with an rf analyzer/bridge. No mention of L networks, etc. When you connect a
Hi Rich, no, I said "C1 resonates the network" but no matter, we both know what the intent was. While driving up to my eme operating QTH this morning I was thinking about the subject and came to an i
Hi Tomm, measuring plate load impedance is a tough job for a typical ham project. For that reason we tend to calculate that and hope it is close (it will be). In practice, the tuning process optimize
Tomm, there might be interest in this subject by others so I will send to the list also.Your Rp numbers look fine to me. I haven't studied the GS35 closely but the data I have seen impliess a gain of
No capacitor in a L-network or a Pi-network (double L-network) resonates the network. Hi Rich, here is the plan for the bullet proof dip meter and test: The PA has an 8877 tube in it with a 1000 ma p
Hi Rich, Before getting into this discussion too deeply, are we all in agreement that the fundamental parallel to series equivalent and series to parallel equivalent mathematics are correct and accep
In a message dated 2/21/2005 4:47:23 A.M. Central Standard Time, r@somis.org writes An L-network transforms E and I by operating near resonance. The greater the Z-transformation, the closer it operat
Hi David, it will absolutely be helpful. Heck, the grid dipper test is helpful. We have been arguing over er, discussing, such a small difference in frequency that it is basically a trivial differenc
dudes where can I get a small variac 2.5 amp or less not to costly. thanks >>>>>> john kb9tc I bet you would find one or more on ebay under Variac or Powerstat. 73/k5gw ______________________________
Look, If Rich said it, that's all you need to know. -S Hi S, you sound like a good and loyal friend. We all can use one of those! 73, Gerald K5GW _______________________________________________ Amps
The main point of my post was the ruggedness and reliability of the 3CX1200A7 tube in the AL-1200. It has one of the lowest failure rates of any transmitting tube made by Eimac. The 8877, in contrast
Anyone know of a source for SB-220 bandswitches? Tried to e-mail KM1H, but it bounced. Harbach is down indefinitely. Thanks and 73's Gary - KN0V This is not good news; does anyone know the nature of
Re: 4-1000 vs 3CX1200 3kw output. I agree that no one has reported this kind of output from a 3CX1200 tube. At their current price tag it doesn't seem prudent to attempt this even though Eimac has pu
In the AL-1500 diagram, the cathode is connected to one side of the heater, C7 couples RF from the tuned-input to the cathode ,and C8 couples RF from the tuned-input to the other side of the heater.
Hi Paul, please pass along the information about where to purchase these gas discharge devices and to get more info about them. Perhaps this is what we need for our mid size tetrodes used at 432 and