I looked at the CommAmps website, nowhere could I find the word 'Linear' or any IMD spec's. I'm sure that they are linear to a degree, but would sure like to see it spec'd. -MikeWA6ZTY ______________
Didn't this kinda minimize the gains of learning from your mistakes? -mike _______________________________________________ _______________________________________________ TowerTalk mailing list Tower
My HDX-572MDPL came with 1" anchor bolts with a welded nut at the bottom. The nut diameter is only slightly larger than the shaft so I am considering the addition of a heavy washer wired against the
Thanks for all of the feedback on my anchor question. My HDX-572 was manufactured around 2001 but never erected. I bought it from an SK's estate without doc's. Evidently this was before their ancho
A 10 volt filament transformer can be wired autotransformer style to pre-compensate for the Cu drop. -Mike _______________________________________________ ____________________________________________
I view a stalled motor as being similar to a transformer with the secondary shorted. The current will be limited only by the winding resistances and the leakage reactances. Surprisingly, the PF is
I'm wondering if the supersonic squawker devices that are purported to repel 4 legged vermin might work for birds too. -mike _______________________________________________ __________________________
Sorry folks, I've been trying to resist, but I just gotta ask.....Was he using a Balun? -MikeWA6ZTY Right. Over a period of a year or so, I have 125 countries worked QRP. N6BT has often talked about
How close to vertical must Cadweld One Shots be? I'd like to drive some ground rods diagonally into the sides of my tower foundation hole but am concerned that the One Shots might not function prope
I'm putting up a HDX572. Digging the hole has been quite a job, hardpan was encounter a few feet below the surface and it was alternating jackhammer and backhoe work for two days to get close to the
It's not clear if their calculation indicates survival (won't bend) or failure (opps!) rating. -MikeWA6ZTY _______________________________________________ ____________________________________________
I have no idea if Amphenol Connex has any lineage with Amphenol RF, but it is a legitimate company. It is stocked by most of the major parts houses and also at RF Engineering. I believe that Ampheno
I recently took out a building permit to erect a 72' crankup tower. Not long afterward, I received a letter from my county tax assessor, he had been notified that a building permit had been issued a
I had originally replied to KG2V's query offlist, but after reading other replies I decided to post my reply to the entire list to share my concerns about using Aluminum in this application. -- Since
You didn't mention how long your radials are and whether they are buried or elevated, but for 65' radials just off the ground, EZNEC says that resonance is as you indicated, 3550 KHz. This is with #
The formula for calculating the inductance of a flat strip is a bit tedious to work by hand, I found this calculator online that seems to produce believable results. http://chemandy.com/calculators/f
I'm about to raise a 72' US Tower equipped with a pair of TB2US thrust bearings spaced about 3'. I'll be using a TailTwister2 Rotator. Is there a procedure for centering these components to preclud
The tower was purchased by an SK who never put it up. He ordered it with the 2nd bearing. I'm just trying to do the most with what I've got! So.....How do I center the system? My current plan is;
Ken, My HDX572-MDPL is 2002 vintage. The V-belt motor pulley is 2.5"OD and bears the following markings; AK25, and K273 (the 3 is vague, might be an 8). The V-belt is L4-370G. My motor shaft is 5/8