[Repeater-Builder] SCOM 7330 Experiences ayone?

On a quick look at the available controllers around the SCOM 7330 looks like a fairly new kid on the block. I wonder if anyone has had any experience with this model or SCOM as a whole? -Mike

RE: [Repeater-Builder] Power Supply from a PC. Slightly OT

May 2002 QST had the computer power supply conversion article QST switching power supply product reviews are July 2006, January 2000, and Sept 2000 John Lock kf0m at arrl.net > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:[EMAIL PROTECTED] Behalf Of Eric Lemmon >

RE: [Repeater-Builder] Power Supply from a PC. Slightly OT

John, What issue of QST carried the article about converting a PC power supply? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:[EMAIL PROTECTED] On Behalf Of kf0m Sent: Sunday, August 03, 2008 7:41 PM To: Repeater-Builder@yahoogroups.com Subjec

[Repeater-Builder] WTD - 222 bandpass filter

Local club is in need of a 222 bandpass filter or cavity suitable for use between the duplexer and the pre-amp. Please email direct if you have one avaulable. Thanks Mike/W5JR

RE: [Repeater-Builder] Power Supply from a PC. Slightly OT

I did a computer supply conversion here. the one I did was a 150W supply so only good for about 10A. I followed the QST article for the conversion. This one had a pot for adjusting the voltage. I had to change one resistor value to get 13.8 VDC out. The output wave form looked like the early co

[Repeater-Builder] FS or FT DB 201, GE MLS and Midland 1340B

I have a new but open boxed DB201M uncut version 144-174 Mhz for sale or trade. It comes with the DB365-OS clamps also. Also have two, 2 channel UHF GE MLS I's for sale. Comes with one hand mic,one desk mic,DC cord and one mobile bracket all in excellent condition. Also have one Midland 1340B VH

Re: [Repeater-Builder] Db4001 to 222

I once cut down 4 VHF cavities for a BP/BR 222 duplexer. Fairly straight forward but probably not worth the labor involved. Jack - N7OO - Original Message - From: k0jxi To: Repeater-Builder@yahoogroups.com Sent: Sunday, August 03, 2008 4:38 PM Subject: [Repeater-Builder]

RE: [Repeater-Builder] Power Supply from a PC. Slightly OT

Dependant on your needs it is entirely possible to use as is OR rewind things for a given output , google it as several articals are available , if I can make one work most anyone can , I notice no particular additional noise on hf although I do live in town which may be a noisy site anyway M

[Repeater-Builder] Db4001 to 222

Had to repost this because of bad email typing Has anyone ever converted one of the DB Products 4001 highband pass cavities to a 222 pass or pass notch cavity? I know DB makes or made a 222 version of that mocel but wonder if it is feasible to cut one down and make new loops. Appreciate any info.

Re: [Repeater-Builder] Re: Dual battery system

Thanks eric for the reply, I'll try that. mike - Original Message - From: Eric Lemmon To: Repeater-Builder@yahoogroups.com Sent: Saturday, August 02, 2008 7:55 PM Subject: RE: [Repeater-Builder] Re: Dual battery system Mike, I have standardized on one part, the 122NQ03

Re: [Repeater-Builder] Re: power cables needed

Hi Mike, Thanks for the reply on the cables. Please contact off list and how much do you want for them, maybe a dozen or so? [EMAIL PROTECTED] 73, Mike aka KB5FLX

[Repeater-Builder] RE: [GE Mastr II] 2m/220/440 Repeater antennas

Fred, I think you're a top-notch daydreamer! But seriously, I wonder if any multi-band antennas have a DC-grounded construction that will handle a lightning strike. Also, the harmonic relationships of the 2m, 220, and 440 bands in one antenna might create an effective intermodulation generator.

[Repeater-Builder] VHF Duplexers wanted.

Wanted to buy. We need a set of duplexers for our 2 meter repeater. It is on 146.720 with a - 600 kc input. Does anyone have anything suitable. We have been looking at the Sinclair Q202GR on eBay at this time. Does anyone know anything about these? Thanks, Mick

[Repeater-Builder] Re: Unknow Radio - Anyone can help?

That appears to be a Mocom 70 dash mount radio. They did manufacture some and they were often found in things like Cement Trucks and other large heavy machinery with space to put a big radio up front. They had to have everything torqued down inside very tightly as the shaking in that environment

Re: [Repeater-Builder] Unknow Radio - Anyone can help?

Make sure you don't have any early model Mocom 70 (we're talking early 70s here). The initial production runs did not have the famous and reliable cavity front end in the receiver but a series of copper cans with coils inside. These were as broad as a barn door and resulted in desense from an

RE: [Repeater-Builder] DB408 / DB420 in the ham band? (was Re: DB314)

> You gentlemen have really made me think about the pros / cons of the > DB314. After talking with my tech partner on this project, I think we > are going to go with a DB224 and DB408 or DB420 combo for the remote > antenna. It really is overkill for a remote antenna, but since we > will be given a

Re: [Repeater-Builder] Measuring Desense

Hello (Again) John Yes--It is necessary that you put the iso-T immediately in front of your receiveryou want to be testing against the signal that is presented to your receiver after all of the processing before it. A couple more thoughts Don't overlook the possibility that your du

Re: [Repeater-Builder] Re: Measuring Desense

John might find this article interesting... Mike WA6ILQ At 09:56 AM 08/03/08, you wrote: >Right on the money Scott... many times the antenna and/or >feed line can be the trouble maker. Although not practical >in many cases... a 50 ohm

RE: [Repeater-Builder] Power Supply from a PC. Slightly OT

I was looking at an ad in the new Texas Towers circular about a brand of power supply that I have not heard of..it was not Fischer-Price but something like Jetblue or JETSTREAM. These claim to be fully filtered and RFI friendly. Anyone ever try one of these? They have models up to 45 amps and lo

Re: [Repeater-Builder] Power Supply from a PC. Slightly OT

There was an article in QST a couple of years ago on doing this very thing. The major caveat is that the power supply MUST see a load at all times, in order to maintain regulation. Noise can definitely be an issue, but each manufacturer's supply is likely to be different from the next, with res

[Repeater-Builder] Re: Switching a Repeater Betwen AC Sources

The part that would scare me... I suspect the mentioned APC units are probably using Solid State AC Relays. Most of the more common SSR's tend to leak through... , which can be really dangerous in the wrong application. cheers, s. > "Eric Lemmon" <[EMAIL PROTECTED]> wrote: > > My definition

RE: [Repeater-Builder] Re: Switching a Repeater Betwen AC Sources

My definition of "seamless" is no interruption at all, which usually means an on-line UPS in which an inverter runs continuously on a DC supply that floats on batteries. The APC unit on the link shown in the original posting must disconnect from one source before connecting to the other source- an

[Repeater-Builder] Re: Measuring Desense

Right on the money Scott... many times the antenna and/or feed line can be the trouble maker. Although not practical in many cases... a 50 ohm test termination at the top end of the feed line can tell you a lot... Knowing the "effective sensitivity" at the site is a big deal often overlooked

[Repeater-Builder] Re: Measuring Desense

Hi John, Some quick opinion included information... I would make 100% sure the duplexer notches are properly placed. I would remove the power amplifier and the preamplifier and resolve the repeater operation to the best possible basic level before replacing them back into the system. Addin

Re: [Repeater-Builder] Measuring Desense

John--- I don't know if you have done the following yet but if not you should. Put an iso-T in front of your receiver and do a simple desense test using your signal generator into the iso-T. Set the generator for a couple of kc, deviation at 1 kc so that you can easily recognize it. Run the

[Repeater-Builder] Re: Switching a Repeater Betwen AC Sources

The caveat is in the web page text... [pasted APC web page text] > If the primary power source becomes unavailable, the rack ATS > will seamlessly source power from the secondary source without > interrupting critical loads. [end pasted text] Depends on what your interpretation of "seam

[Repeater-Builder] Power Supply from a PC. Slightly OT

Hi All, This request is slightly OT but still for Amateur and possible Repeater use. I read an artical about using a PC power supply as a 12 and 5 volt/ high amp atable power supply for the bench. Looking over the specs it looks good for 12v at 19A and 5v at over 30A. Was interested and due to t

RE: [Repeater-Builder] Measuring Desense

Skipp, Mike, and others, A ham club member has a tracking signal generator/spectrum analyzer that he said has recently been calibrated. He re-tuned the duplexer for me. Now the receiver hears better than before, but the de-sense has not changed much. I have tried the repeater with and with

RE: [Repeater-Builder] Bang for the buck?

I have an arcom rc-210 and found that the cat cable I had worked fine on a pc but not on my controller. It turned out to be the circuit in the cable that converted levels for the yaesu radio took power off of the serial port on the pc. (cts or dtr I can't remember) anyway I took a 9v wall wart

RE: [Repeater-Builder] Re: UHF MICOR Unified Chassis

Well, more progress... I couldn't sleep this morning and was up before the crack of dawn (in other words, about 4AM) so I decided to do more testing the station. I have discovered that in order to defeat any individual PL RX tones, I must have the tone switch "OFF" on the Four User Control Module