On the other hand there are probably a lot of peninsulas etc. that are going to become islands.

Wx2s.

I think they'd grow a lot faster if they dropped the confusing and useless public key infrastructure.

Wx2s.

I am buying one of the 3 foot sections of 25g tower, that have the hinged legs, and I want to re-inforce the legs with short lengths of pipe. I know that typical 25g is 1 1/4 inch o.d. 16 guage, but I cannot find what the inside diameter of the 25g leg is. Does anyone know offhand? I am away from my qth this week and unable to measure for it.

Thanks,
Lynn- WBØYEX

Obviously you need (better) isolation from the oscillator.  Some methods:

-Tube RF
-Follower opamp
-Link coupling (inductive)
-Capacitive

I'm not sure what level of technology you are using.  However, you can get ideas from looking at circuits from similar designs.  Of course other references like college texts, ARRL/west coast handbooks, Radiotron Designer's Handbook, etc.

Once you look at some references I think the solution will jump out at you!  b.

As I mentioned early in this thread, some MARS frequencies are close to the legacy ham bands, but many are not. The TL-922A design allows the amp to tune roughly 500 kHz above and below each of the legacy ham bands with ease, but many of the MARS frequencies are much further away than that from the band edges. Here are some approximate examples:

2.6 MHz
5.8 MHz
9.3 MHz
12.1 MHz
16.2 MHz
Etc.

On those frequencies, it is impossible to tune the amplifier's tank circuit to resonance not to mention the impact of the amplifier's input circuits.

73s de Bob NT0A

Thanks for the "greenkeys" tip.  I was not aware of that phrase.

My Elmer of 30+ years ago was an avid teletype guy.  I remember visiting his shack in my pre-novice days and always being in awe of the teletype machine "typing by itself" in the corner of the room.  Pre-novice innocence ya know.

FYI:  Searching by 'greenkeys+teletype' in Mr. Google returns better tuned results.

NF6E

John, I agree with you. It probably would have been unecessary for the added extra expense if I wanted to fight them on that issue.  However, I felt lucky just to finally get the permits in hand.

In retrospect, I am so glad I purchased the heavier tower with the motor drive.  The crank up with the motor drive is the only way to fly.

73, Jim AB4D

Frankly, I think you're taking the wrong approach.  Your QRZ bio says you're really interested in working DX.  If that's still true, forget the all-band approach for now, and build an antenna that will allow you to work one of the best DX bands - 20 meters.  You can build a simple 1/4 wavelength vertical with stuff you can buy at Home Depot for not much money.  Take the time to learn which bands are best for DX at the times you'll be able to get on the air.  Both 160 and 6 meters are a bad idea for a beginning DXer and 80 meters isn't much better.  I suggest concentrating on bands where you'll be able to work DX just about any day of the year and that is most likely 40 and 20 meters.  Being able to transmit on 160 through 6 isn't of any advantage unless you're going to chase the DX Challenge award from day one.

73, Floyd - K8AC

I can't understand why.  The problem is a simple tone that cycles about 250 times per minute.  If you have any familiarity with CW, you can imagine a Vibroplex key sending dits set for 250 dits per minute.  It is very precise and has no related noise or hash; just a very accurate clear CW tone.

Listened over the last two days when 12/15M were bad and there was nothing.  During the same two days when 17/20M were open, the tone was there.  My antenna is a dipole and it only occurs when the antenna is connected.