Amen, Steve. If he tried a dummy load on the amp, and there was no birdie then, it seems to me, it is narrowed down to the antenna system or the ground system. Like you, I have seen many weird thing
Ditto for MFJ and Hygain parts also! I have been waiting over a year on both. They always sound competent on the telephone, but the orders never leave the dock for some reason. (((73))) Phil, K5PC
1-solid green........this is a tap on one of the primary windings. (not used in the AL-1500) This would cut the HV down a few hundred volts, I suspect. 2-brown with a white stripe........one side of
Amen, Rich! It is obvious that 160 meters was an after-thought with the 77 series from Alpha. Also, the 77SX tank coil is the same as the 77DX. (2 tubes vs one) Another one for the list is the SB-10
Current rating has nothing to do with the ETO and Heath problems. They get too hot and change value. The power output on 160 meters changes after tune-up. The micas don't do this. (((73))) Phil, K5P
I stand corrected, everyone! I thought the Ameritron caps were mica...my mistake. I do know that every SB-1000 I have tuned up on 160 meters has the same drift problem. I have cured that problem on
I am not aware of a web site, Rich, but they have been most helpful to me over the years on the telephone and mail-outs. High Energy Corp. Lower Valley Road Parkesburg, PA 19365-9603 800-732-5405 vo
I have a mica cap. here on my desk that I use for a paper-weight. It is made by Captron.....5100 pf @ 3000 peak volts. The current ratings marked on it are: 9.1 amps @ 3000 khz 8.2 amps @ 1000 khz 6.
One would assume from experience with other electronic devices that if a cap is rated at 8.5 amps at a certain frequency that there is headroom built in so that 8.5 amps can be applied continuously
I have never seen an "A" model, Dave, but the basic difference between the 2500 and the 2500B was the installation of "FL-1" in the input circuit and a mechanical stop on the band switch to prevent o
I have been running a pair of 8122's in two of my Harris amps for years. However, they are drivers so they really have had a coddled life! (((73))) Phil, K5PC
I have used my Ameritron QSK-5 switch on several solid state amps. It works very well, and is several times faster than vacuum relays. I currently use it with a Henry SS-750 and an Icom 706 as my "po
I have watched the changes at Dayton since 1990. The odds on finding someone who knows what these are...c. 50% The odds on finding someone willing to pay what they are worth; (c.$400 each) c. 15%. T
? The best bias V for the 8877 is that which produces the recommended ZSAC of 90 - 180 mA. In other words, it is not very critical. That is true, but I have found by testing >30 new 8877's @ 4 kv key
I have run across the same problem several times. The folks at ECA have always been most helpful in letting me have the specs and tap data on their transformers and chokes. I think they are still in
One of the dead give-aways on a S.S. amp is the band switch and the low-pass filters for each band. You need at least 6 filters in the output to cover all nine bands. Even a "single-bander" needs an
It is very possible, you only have to switch six times or less to cover 160-10m. These low pass filters are very broad...six gives continuous coverage from 1.8 to 30 mhz. As far back as the old Magn
Henry Radio sells a beautiful tuned input; 160-10m, fully assembled on a mini-chassis, complete with a nice ceramic band switch for a very reasonable price. I have used them on several amp projects