I emailed Cushcraft a polite enquiry on Monday about spare parts. I'm still waiting a reply. Can't say I'm surprised but it was worth a try. Customer service - humbug ! G4ZTR I called and ordered tra
It sounds very similar to something which I make ................ http://www.aerial-parts.co.uk/shop/category_4/Mast-bearings.html?shop_param= cid%3D%26 I have one on my 2m EME array, no problems at
If you oil the cable, won't the oil wash off the first time it rains ? John G4ZTR --Original Message-- From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behalf Of kr
Chaps I have lost the original message, in which someone asked about either 6/19 or 7/19 cable. I can confirm it is available here in the UK (but not necessarily of UK origin). 6/19 and 7/19 are type
Hello Tom I assume you're in the US ? There's likely to be a Stauff stockist in your state, but if you can't find one, or they're not interested in a small order, I can help. Fortunately, they're not
Barry Just be careful not to insert a bolt which is even a tiny bit too long. If you do, when you tighten it up it can push the material at the end of the hole away, which can weaken the rotator casi
Doug No problems here with Eco 15 and N types. I have it on two rotator loops of about the size you mention. John G4ZTR OMs I am wondering just how flexible Ecofllex 15 coax may be. Can I use this co
I'd suggest that for real grip you do not need lots of contact area, instead you need "teeth" on the saddle. Something like this ............... http://www.aerial-parts.co.uk/shop/article_150/V-Bolt.
Mike You must locally remove the galvanizing before welding. As already noted, there will be fumes, and the galvanizing can "spit". To protect the metal afterward, clean back to bare metal and apply
Larry Sounds like you need some professional help here ! To answer some of your questions ... Yes, concrete will set if it is placed in water. There would only be a problem if it was running water su
Hi Don Not enough information ! How tall is the mast ? Will it be guyed or freestanding ? What will you put on top ? What soil do you have 3ft down ? Regards John G4ZTR _____ From: towertalk-bounces@
Don I see you've already had some replies and suggestions. I'm not a PE, but I am a chartered engineer here in the UK. However, my expertise is not in foundation design ! I'll go on experience and in
You forgot the most important component - cement ! John G4ZTR _____ From: towertalk-bounces@contesting.com [mailto:towertalk-bounces@contesting.com] On Behalf Of George Dubovsky Sent: 13 July 2012 00
Hans I don't feel competent to comment about lightning strikes and earthing, but your proposal has some engineering issues: The catenary of wire plus control cable plus coaxial cable will be heavy an
Sorry Dan, you will get answers that are close to meaningless ! John G4ZTR _____ From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Dan Bookwalter Sent: 13 October 2012 17:11 To:
I think this is common with most tilt-over towers. It certainly applies to the UK manufactured Versatower. The first few degrees movement from vertical is overcoming a "self-righting" force which occ
Quote: "Now the only thing resisting your tower from tipping over that 627lb pier." Surely, the weight of the steel tower too ? John G4ZTR _____ From: TowerTalk [mailto:towertalk-bounces@contesting.c
Robert The principal forces on your stub mast are bending and torque. If you place an aerial on a stub mast which is twice the length of your current one, the bending moment at the rotator will be tw
Take a look at the web pages of GM3SEK, there's guidance on stacking yagis for different frequencies. John G4ZTR _____ From: TowerTalk [mailto:towertalk-bounces@contesting.com] On Behalf Of Jim W7RY
When the tower is vertical the wind will exert a force, in which the critical factors are wind speed and area of steelwork presented to the wind. When the tower "lays over" gravity exerts a force on