Might have had a klystron and small magnetron for radar guidance. Did you see any waveguides? Keith NM5G You might be right. Everything I saw was solid state but there may have been something in ther
Agree with this assessment. I use a McIntosh MA6100 amp/preamp and Sennheiser headphones (to eliminate spousal complaints about loud music) at home. This amp is not offered now, going out of producti
Once tuned as desired, why not cut the wire at the outer bend point? The only negative that comes to mind is if the resonant frequency rises over time due to environmental changes (e.g. new metal str
I have no numbers to give, only anecdotal comments. During operation of VP8WWW last week we used one trapped 5-band Yagi (Mosley Mini-33-A WARC) at 25 feet, one trapped vertical (Cushcraft(?) 80-10)
My guess is that, for your location, your chief concern with a 1000 foot tower would be right-of-way access for guy points. Close behind in second place would be FCC/FAA approval. <smile> [snip] Fina
If you have not already, remove the XM240 coax from the switch and replace (on any port) with the TH7. If the SWR is normal, your problem is likely with the XM240 grounding the TH7 in some way. Keith
Check with an attorney. You may be able to get around this by signing a liability waiver with proof of financial capability to back it up. Keith NM5G ke4jrv I am looking for some engineering specs fo
You will probably be okay at 75 to 80 feet with standard guy tension and modest antenna (<10 sq feet). The only problem would be an extremely high wind (70-90 mph) from east or west against the wides
The higher location will yield a lower take-off angle for improved DX contacts. However, short range contacts may suffer a bit. If you have the means, add the extra height and another tribander. You
I have a partial roll of about 700 feet, but you likely would not want to pay shipping from Houston area. <grin> If you can't find a local supply, try Texas Towers (http://www.texastowers.com/ 800-27
Subject says it all. VSWR went to 5 at some point during operation of VP8WWW. The filter box was set to 10 meters and connected to a trapped vertical and Kenwood 480HX. Transceiver was set to 200 wat
Thanks for all of the responses. I ended up contacting Jay Terleski at Array Solutions where the boxes were purchased. He referred me to Mike at ICE. Mike is shipping replacement caps so I can do the
I bought a 1000' roll of 9913F7 from The R.F. Connection (http://users.erols.com/rfc/index1.htm). They had the best price. Good service too. Keith NM5G Looking for some 9913-flex or Lmr-400 ultra-fle
A ham here in the Houston area had 50 feet of Rohn 45 freestanding for years with a small tribander on top. It never failed even in high winds. I would not trust 80 feet even without antennas, but yo
I chose the 400 series Bulgin environmentally sealed connectors for all cabling up the tower. These are industrial type circular connectors available from Mouser. They are sealed to IP68 specificatio
IMO restoring a rusty 25G is flirting with disaster. Depending on age and extent of rusting, you could be risking a lot climbing a tower like this. Keith NM5G --Original Message-- From: towertalk-bou
9913-flex (Belden 9913F7) uses foam rather than air dielectric. Keith NM5G Looking for some 9913-flex or Lmr-400 ultra-flex. About 700 to 1000 ft. I won't let 9913 near my tower<:-)) Lightening blw o
New guy grips can be re-used for up to about 6 months after the first application. After that time period the semi-soft resin that helps grip the steel becomes hardened and is useless for another app
I like the 30 amp powerpole connectors. If you are concerned about the firm locking grip, wrap the pair with a small piece of Scotch Super 88. Automotive connectors should also work fine. However, th
How does one increase the current rating of a capacitance circuit? I have a mica capacitor rated at 540pf/500v. If two are wired in parallel the result is 1080pf/500v. If two of these pair are wired