Author: Herbert Schonbohm <herbert.schoenbohm@gmail.com>
Date: Thu, 23 Jan 2014 12:44:18 -0400
Some would argue that putting ground rods at the end of radials doesn't really help. In most cases you can do well, perhaps better with #12 or about 90-100 feet for each radial due to the velocity fa
Author: Herbert Schonbohm <herbert.schoenbohm@gmail.com>
Date: Thu, 17 Apr 2014 17:51:29 -0400
I did these optimizations about 15 years ago and both, if I recall correctly require boom extensions and a Phyllistran support for the boom to the mast to reduce the boom droop. I can't say that the
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Wed, 28 May 2014 06:47:05 -0400
I am currently rebuilding my six meter six element beam and would like to use Hygain element to boom clamps. Are there any standard conversions for element length different to a standard u-bolt or in
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sun, 01 Jun 2014 21:09:31 -0400
Some time ago I posted a problem I had with the RSC12 8 position Antenna switch controller sending out phantom voltages to the switch causing the extra relays to close by accident. Measuring voltages
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Mon, 02 Jun 2014 07:10:03 -0400
Some time ago I posted a problem I had with the RSC12 8 position Antenna switch controller sending out phantom voltages to the switch causing the extra relays to close by accident. Measuring voltages
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Wed, 04 Jun 2014 02:55:06 -0400
Depending on the top diameter of the pole a top section of a Rohn 25 can fit over the top and be securely bolted or lagged in place This makes the antenna mounting and rotor plate easier to work with
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Wed, 04 Jun 2014 02:58:44 -0400
Depending on the top diameter of the pole a top section of a Rohn 25 can fit over the top and be securely bolted or lagged in place This makes the antenna mounting and rotor plate easier to work with
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Thu, 19 Jun 2014 13:29:40 -0400
I just received back from Rotor Norms with repair charges under $100 for a Ham IV rotor sent up to him in really bad shape with stripped gears and missing bearings. The turn around time was fast and
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Fri, 20 Jun 2014 08:17:05 -0400
Three bands no traps and great performance the three element Cubex Quad wins hands down especially for price and wind load. Plus with proper matching 75 ohm stubs on 10 and 15 I get both CW and SSB c
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Fri, 20 Jun 2014 10:49:59 -0400
Perhaps your right Joe....but tri-band quads deserve better consideration as I think they are getting a bad rap. Below in bold italics is my rejoinder. Why not many serious DX-ers and contesters cons
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Thu, 26 Jun 2014 17:14:29 -0400
W5DXP posted this some time ago about the T2FD......end of story. Herb, KV4FZ I looked at the following T2FD antenna used on the HF bands using EZNEC. Frequency, ~efficiency, ~SWR with 9:1 balun 1.9
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Wed, 27 Aug 2014 14:19:53 -0400
Larry if you use a 3 or 4 wire cage I understand that the cage itself is what is doing most of the radiating and not the tower. Herb, KV4FZ 73, Larry W6NWS How is inteference on rotor or relay boxes?
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Thu, 28 Aug 2014 14:15:23 -0400
On March 30,2014 I sent my MFJ-259 fpr reapair and the replacement of the front end surface mount diodes which I included in with the repair request. They claimed they do not have my unit. So I sent
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sat, 30 Aug 2014 09:35:12 -0400
After a week of continuous voice mail hell and leaving detailed messages with no reply nor e mail reply I decided to call the only section of MFJ that answers the phone, the order desk. I spoke to Ja
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sun, 31 Aug 2014 20:05:53 -0400
So much of the obvious disappointment with MFJ could be easily resolved by having better communication with the customer. I have nothing but praise for the way RF Concepts (Alpha) who has responded t
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Mon, 01 Sep 2014 10:57:29 -0400
I don't know who is running things in Starkville but they really need help. I got a reply from the finally and they said they found my "tuner." Problem is I never sent them a tuner. They also said th
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sun, 14 Sep 2014 20:32:40 -0400
Question: Would it not be easier to just have two extra wires cut for for the low end and the other for the high end of each band and feed them from a common feed point with minimal matching componen
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sat, 20 Sep 2014 19:30:43 -0400
My son is a Comtrain certified tower climb and was working on Bordeaux Peak in St. John on a 300 foot PyRod tower. The tower owners insisted that every climber was required to use the "fall Arrest" s
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Sun, 21 Sep 2014 11:54:55 -0400
The "Fall Arrest" cable in this incident was high quality stainless steel that sometimes defies visual inspection especially in fittings. In this case the cable had rotted internally near the top fit
Author: Herbert Schoenbohm <herbert.schoenbohm@gmail.com>
Date: Tue, 11 Nov 2014 14:57:10 -0400
Yuri, You might want to remove the sheet metal screws that connect the trap body to the actual driven element. (You might want to check the reflector and director as well) Occasionally some aluminum