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You have it right, Its just two separate bias schemes I think the 148 has better regulation because it has SSB. The 25/29 being fixed and the 148 being regulated with thermal tracking.

Bias in SSB operation is set to 25ma for the driver and 50ma for the final. (per factory service manual) This should be Class A with 12 volts on the collectors. In AM mode the voltage regulator drops the collector voltage by about half. Assuming that lowers the bias to Class C? I just know...

I own a few of the Lexicon cheaper USB Interfaces, all have worked great. I do however use the ASIO4ALL driver. If you buy new Lexicon it also comes with Cubase software that supports the free VST plugin's. The Cubase software is similar to ProTools. I bought my Alpha for under $50 My Omega...

The negative (not really negative) negative below the carrier reference line is the untouched waveform, nothing is compressed. The positive peaks are amplified, since any alteration of the waveform is distortion you will see the differnt conducting angles.

Regular headphones seem to work well. Only issue i have had was when using a .010-.001 capacitor to roll off the high frequencies. Every time I add a cap the impedance miss match was horrid. Using the diode only the quality was decent!

The easiest HiFi setup is, get a Galaxy (or equivalent), Direct inject, buy a Lexicon Alpha, Buy cheap dynamic XLR mic, Buy a couple patch cords and last download free VST plugins and host! Someone was asking about trapezoid scope pics of the Mauldulator, trapezoid is not only for testing the...

10-20 wraps of wire around your coax, germanium diode and some headphones is all you need.

The reason for Tantalum, you can get a larger cap in a smaller package...... Nothing more....... ESR and 50v rating are a bonus but not necessary.

I have bought two of these and a few of my friends have bought some. They work really well!

You will absorb more aluminum from your antiperspirant deodorant than by sanding on aluminum. Sanding wet, dust mask and being outside would help.

Try some aluminum brightener its sold at the auto parts store.

I have played around with the TopGun Modulator and lots of NPC mods. The Top Gun Modulator does not sound as good. A properly setup NPC mod will outperform the Top Gun. I have a Magnum S-9 that I removed the TopGun Modulator on and installed a NPC mod. Their compressor seems to work alight...

Does your Direct TV box happen to be an HDTV box? If so then most likely its a bad designed box. In some boxes they use infrared and RF radio frequency to control the box. The RX for the remote control is vary poorly shielded. I shut mine off with a stock CB radio out of the box. A lot of hams...

Ya it need some filtering. A "Pan Adapter" is the best way to use one. One of these days I will get around to hooking it up to an old HF receiver. Still a fun little dongle I use mine almost every day to check conditions on my laptop. I just have it connected to a scanner antenna. Saves me a...

Fine Tune Cb He will even send you a video with your radio on a scope http://www.finetunecbshop.com/home.html

If your bias voltage is above 3.4v on the gate all the time you shouldn't have any issues. The KL503 is biased with zener diodes and they should work just fine with voltage fluctuation. You can use a LM317 but I really dont think its necessarily going to be better. I would bypass (if you...

Bump for Daiwa I have a 801, they are great meters really well built!

IRF520/ERF2030's are the replacements for the KL503 NOT ERF7030's ! My KL503 only produces 150 linear watts anything more saturation is noticeable. For SSB operation i also had to increase C34 by 12pf to provide enough bias to TR2. If you have choppy audio with your KL503 then this mod should...

I would get an ARRL antenna hand book and keep it for some bathroom literature. Even an old edition is good I think mine is from the 1990's.

I have 3, 2 are still in the original package :thumbup1: