Recent content by 9C1Driver

The best option would be to have amplifiers built with the older finals because they were actually designed for transmitting. Examples would be the Toshiba 2sc2290 and 2sc2879. I think this also applies to others like the sd1446, mrf454, and mrf455. These have been discontinued now, HG is...

A sharper person then I can chime in here and let us know. That white square part to the left of the finals that says PCD might be some kind of a bias part. Pics of class B X-Force and Carl built have a similar component. You have a nice little amp there.

Yes, the 200P has a single sd1446 final. The 203 has the RM3 mosfets.

Just AB. The terms AB1 and AB2 in amplifiers are used for tube amplifiers. Has something to do with grid current draw. Can’t remember now.

E-Bay is definitely not what it used to be. Hope that works out for you. With Texas Star the ones with a SSB delay on the back are the high drive variable versions with the variable control on the front in the middle. The ones with all push buttons on the front are the "low drive" versions...

The amp goes between the radio and watt meter on a jumper. As long as your antenna switch is rated to handle the wattage from the TS500 you should be good. I assume your just running 10 and 11 meter correct? As far as your antennas I don't know why you would need a coax T. I figured you have...

If your on AM and it sounds pinched up or crunchy you are probably overdriving the amp. If your radio has an RF power control on the front turn it all the way down. With that small of an amp something like a .75-1.5 watt dead key input will be plenty. Too much peak swing input can also overdrive...

Wow that's tough. Back in the day when the Magnum Radio line came out (Alpha, Delta, Omega Force, 257, S3, S6, and S9) he was the master with those. Many shops just could not tune them right with the Top Gun and Md1. With Bob's they all came out killer.

There are several unlock options, make sure you have it set to what you want first. Here is a better video below.

I kinda like this AI stuff. Yes, genuine United Chemi-Con capacitors are generally considered very good, high-quality components, especially top-tier series, ranking with brands like Rubycon and Nichicon; however, their reputation is mixed due to specific notorious series (like KZG) known to...

So just bringing up the Uniden 980 for a minute. You might test with a different watt meter. Those were low powered radios, maybe 10-14 watts peak and even less bone stock. When overturned they would fail.

First thought was the KL503 in either version is pretty much a low drive amp. That's a pretty hot radio for that amp. If the RF power on the radio can say dial SSB peak power down to 12-20 watts then it would be usable. On AM maybe 1.5 watts swinging 10-12. Many new radio's still swing pretty...

I can think of many other things radio I would spend 400 bucks on. I would say $225 would be a realistic price point if they actually wanted them to sell big.

9:50 mark shows 4 watt dead key. 1:44 mark shows 1 watt dead key.

They make two versions of the KL503, one with a driver stage and one with out. The RCI 69 base radio is advertised as a 100 watt radio. It will easily overdrive a Texas Star 350 or KL503HD. You need a bigger amp or smaller radio. Based on how your Texas Star amp is acting Vs your watt meter...