I learned the pre-tinning and tubing cutter trick that Karl describes from a W6SAI book on wire antennas. Some time back I learned the trick of roughing up the surface around the PL-259's holes. I'm
Does anyone know if there's a forum or mailing list for the Italian manufactured SPE amps: 1K-FA and 2K-FA? They've gotten quite impressive reviews on the Contesting.com site. 73, Joe K2XX __________
I ran a 30S1 for years with random lengths of coax between the amp and exciter. It never was a problem. 73, Joe K2XX _______________________________________________ Amps mailing list Amps@contesting.
This transistor is Q1 (or Q2) on the Titan 425 amp's bias switching board. It has a multitude of equivalents, some of which I've listed below. The package is a TO126 (flat, rectangular with hole in t
I've owned the 2K-FA since about the first week of 2012. So far, I'm quite happy with it. It replaced a TenTec Titan 425 and a Command VHF-1200. I was getting ready to contribute a write-up on it for
Paul, yes, I have noticed a drop-off in output power with keying when operating at 1500W out in MAX mode. The output drops by as much as 200W before leveling off. Presumably, it is a temperature effe
I've not seen it switch to MID for no reason. However, the key down time at 1500W output can be quite short before it switches to MID. I was checking the power drift issue last night on 80M with a du
Rob, just out of curiosity, what is the key down time on the 2.5 KW THP? 73, Joe K2XX _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com
I probably should address this question to the FT-5000 list, but since this discussion concerns ALC control, it's also appropriate here. There is a switch on the back of the 5000 called E.ALC. Accord
I am not at home right now, but if my memory serves, R117 on the bias board is a potential source of your problem. I believe it's a 4.1 ohm or so precision resistor. I've had it open up on a couple o
My TenTec Titan 425 amp suddenly started showing plate current flow in standby shortly after powering it up. If left on for a minute or so, the plate current will drift up to several hundred mA and t
I've owned a 2K-FA for about 14 months now and it has been literally trouble-free. (It was delivered with one of its six output ports inoperative. The US distributor offered to repair it for me while
The amplifier's output antenna connector. There are six programmable outputs on the 2K. Each can be configured to utilize the internal tuner, if so desired, and to switch to a predetermined antenna f
I believe that some on this forum were interested in the IMD specs for the 2K. The data that were generated for FCC approval can be found here: http://g4ujs.shacknet.nu/spe_2k-fa.pdf They seem pretty
IIRC, back in the old days of SSB, it was recommended to run one's exciter at maximum output and swamp the excess drive with a resistive pad. The reason was that the exciters obtained their maximum c
Can anyone on this reflector help Eduardo? *From:* co8ly <co8ly@frcuba.co.cu> *Date:* Tuesday, August 27, 2013 3:44 PM *To:* yaesu@mailman.qth.net, cw@mailman.qth.net, contest@mailman.qth.net, Antenn
I have a spare power transformer here for the TT Titan 425 amp, which I am considering selling. However, I don't know how to price it. My guess is that it's worth around $300. A good frame of referen
Typically, you can only be key down for about 10 seconds at 1.5 KW before the amp reverts to 1.0 KW. However, there is a mod which, IIRC, only requires cutting a couple of wires, that extends that ti
I have an unused RF Deck for the Henry 2002A 2M amp. Photos available on request. Price is $225 + shipping from 24091. Respond via e-mail or 540-745-6825. 73, Joe K2XX _______________________________
I have an unused RF Deck for the Henry 2002A 2M amp. Photos available on request. Price is $225 + shipping from 24091. Respond via e-mail or 540-745-6825. 73, Joe K2XX _______________________________