Re: [Repeater-Builder] re: DDRR Antenna on a tower
On Fri, 11 Jun 2010, skipp025 wrote: Keep in mind the DDRR Antenna is a reduced size vertical polarized antenna and the Squalo Ho-Loop are normally considered full or standard size loop type antennas that are horizontally polarized. DDRR Antenna mounted on a tower? Only if there were no other decent options.Maybe, but I've never run into that situation. That would definately earn you the hammie award, which is a downward look from the commercial guys. Also, DDRRs are notoriously touchy about the local environment and tuning. Expect a 500KHz wide 2:1 and if anything changes within a wavelength or less of the antenna, it's tuning will change. In short, it's an antenna best used as a mobile, where you're likely to be able to keep it in tune. -- Kris Kirby, KE4AHR Disinformation Analyst
RE: [Repeater-Builder] MOVs for power supply primary
OK, you're looking for something in the middle then. For parallel protectors, LEA CFS or SP series, or Transtector Apex II, may be more in the price range you're looking for (under $1000). Since I don't use protectors of that kind regularly, I don't have any other recommendations other than to stick with repetuable manufacturers and read the data sheets. The cheaper ones will probably be MOV-only. Others may use a combination of MOV's, SAD's, and/or gas discharge tubes. There are pros and cons to each... I don't know of any series protectors that fall into the price range of what I would think you're looking for. Someone else (Eric?) mentioned Square D. The only Square D ones I've used are the ones that are built into the panel (Surgelogic or something like that?), not the add-on ones. We had to replace one in a 3-phase 480/277 panel not too long ago, that's the only reason I'm familiar with them (they have an audible alarm that goes off when the arrestor detects a fault, a nice feature). --- Jeff WN3A -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of Chuck Kelsey Sent: Wednesday, June 09, 2010 8:51 PM To: Repeater-Builder@yahoogroups.com Subject: Re: [Repeater-Builder] MOVs for power supply primary OK, I'm familiar with those single-point grounding panel protection devices. How about a service panel protector for home use? And a service panel protector for a small (200A) 3-phase panel? I ask, rather than simply Google for it, because Google could come up with some units that are not good. Chuck WB2EDV
[Repeater-Builder] Re: DDRR Antenna on a tower
Re: DDRR Antenna on a tower Keep in mind the DDRR Antenna is a reduced size vertical polarized antenna and the Squalo Ho-Loop are normally considered full or standard size loop type antennas that are horizontally polarized. DDRR Antenna mounted on a tower? Only if there were no other decent options. Maybe, but I've never run into that situation. Kris Kirby k...@... wrote: That would definately earn you the hammie award, which is a downward look from the commercial guys. Don't want the commercial radio guys looking down at me any more than they already do... Also, DDRRs are notoriously touchy about the local environment and tuning. Expect a 500KHz wide 2:1 and if anything changes within a wavelength or less of the antenna, it's tuning will change. Possibly why they are normally supplied with a radome. In short, it's an antenna best used as a mobile, where you're likely to be able to keep it in tune. Hasn't been a problem so far, but I could be the exception to the rule book. I'll Keep the Kreco and Sinclair LB Antennas in place on the tower. thanks, s.
[Repeater-Builder] 144.730 ICOM or 14.837 Mastr II, MVP or Exec RX crystal
On a long shot, before I order ONE crystal, does anyone by any chance have either a GE Mastr II Icom for 144.730 RX or crystal on 14.837 for Mastr II, Exec, or MVP ?? Terry wx3m.te...@gmail.com
