Re: [Repeater-Builder] Sinclair Q2B05D Duplexer

What length are the cans? According to Sinclair's old "Duplexor nomenclature" from a 1973 datasheet, that the 2B indicates a 132-150 MHz range. The O5 are "Engineering numbers" and the D = 3in cavity size. Does any of that make sense? Burt VE2BMQ>> Laryn Lohman wrote: > > > I am looking f

Re: [Repeater-Builder] Re: Bi-Polar Prom Programmer Wanted (please)

I think you mean an SRC-10 controller. If you do a web search, you will find the complete docs, and I think they on the RB website. To program is just a change in hex characters for callsign, DTMF codes,Hangtime, CW speed, Link and Aux functions. I just did on for the local club on the crosslink

[Repeater-Builder] Sinclair Q2B05D Duplexer

I am looking for specs and tuning info for this unit. I have searched the RB site but I have not found the info needed. This unit consists of 4 cavities about 4in square. It is VHF. Can anyone help? Laryn K8TVZ

Re: [Repeater-Builder] Mastr II PA's

Hello Scott I hear all kinds of good things about GE Master II PA's, but not being in the 2 way trade, I have never seen one. Is there a picture somewhere on the site that you can point me to? And while you are at it, how much drive is required? I assume that we are talking around a hundred wat

RE: [Repeater-Builder] Re: local club needs repeater amp

Steve, When you mentioned "receivers" as plural, I inferred that the users could hear the repeater fine, but had difficulty in getting into the repeater- which is the classic case of deficient repeater sensitivity. I stand corrected. I think your math is more optimistic than you realize. Typica

[Repeater-Builder] GE tube final

If anyone is still interested in a GE 4CX250 VHF amp, contact John K8YSE at [EMAIL PROTECTED] as he has one or more he'd like to see put into use. 73 de Jack - N7OO

[Repeater-Builder] RE: Basic Question - Required Isolation

Greetings & salutations to the All for 2007. My 2 bobs worth 73 John VK4JKL IRLP 6163

Re: [Repeater-Builder] 10 meter split site rpt, eqpt recommendations?

I would suggest using Mastr II radios. They can be easily 'mixed and matched'. I would stay away from 2M. (Too much noise and congestion there in my opinion. I would instead use a UHF or High-Band radio converted to 220. Either way, you simply swap the one receiver with the other. You end up wit

Re: [Repeater-Builder] CUSHMAN CE-15

Hi John, I have had numerous CE15's and they are nice monitors. The freq display is simply a digital volt meter off of the vco control line. It is not very accurate, just within a couple of meg. I can see the 35khz low if of pagers with no problem. The dvm on my current CE15 bottoms out at 0

[Repeater-Builder] GE Datafile Bulletins

I am seeking to borrow, for full-page scanning, four GE Datafile Bulletins that will be added to the GE LBI Master List: 10002-1, 25-250 MHz Quarter-Wave Open Stub Filter 10007-4, How to Use Duplex Operation Curves 10007-5, Duplex Operation Calculation Form 10008-5, Measurement of FM Deviation by

Re: [Repeater-Builder] Re: local club needs repeater amp

Steve, I'm not quite clear on your repeater configuration... You mention "our receivers" with receivers being plural. Initially I thought you were describing remote receivers feeding a voter located at a single transmitter site, but then you said "assume 1 dB loss from the duplexer" hinting

[Repeater-Builder] Re: Eprom Programmer Wanted (please)

Hi Don, I can do eproms and eeproms just fine... and for ham applications I do the work for free. You need only cover the postage and be patient because sometimes I get busy or side tracked. Email me direct for more information. cheers, skipp skipp025 at yahoo.com > "w5dk_don" <[EMAIL PRO

[Repeater-Builder] Re: Basic Question - Required Isolation

I seem to remember Kevin (kuggie) posted a repeater rf levels text a year, two or three back. It was very good and I meant to print it out for some friends... but I lost track of when it was posted and searching yahoo is sometimes not so easy. skipp > "Andy" <[EMAIL PROTECTED]> wrote: > > Hi

Re: [Repeater-Builder] Basic Question - Required Isolation

I don't know if there's an actual formula, but GE published some duplexer curves that go with some of their equipment, showing the amount of attenuation needed for certain configurations. They can be found here: http://www.ka9fur.net/geduplex/duplex.html 50 watts TX power is +47dBm. 0.2uV sensiti

Re: [Repeater-Builder] Re: Bi-Polar Prom Programmer Wanted (please)

Don, do you have a prom burner? I have one and may be able to read the prom. Also does it have a window or is it a solid cover on top. If it has a window we may be able to erase it and re-burn it. Stan w5dk_don <[EMAIL PROTECTED]> wrote: This brings up a need I have also. I have

[Repeater-Builder] Re: Bi-Polar Prom Programmer Wanted (please)

This brings up a need I have also. I have an old SCR 10 controller from Creative Control Concepts. I need to get the eprom 27c64 edited. Anybody have a contact or resource for me? 73 Don W5DK

RE: [Repeater-Builder] Basic Question - Required Isolation

> My question has to do with how much TX/RX isolation is required for > different frequency spacings. I'm assuming that as the TX/RX > frequency spacing increases, the amount of isolation that the cavities > needs to provide decreases. My question is how do I calculate this? There are two things

[Repeater-Builder] Sinclair Q-305D Duplexer?

I have a Sinclair Q-305D duplexer that I would like to get specifications for. Does anyone on the group know, or have any info on this unit? I believe this goes back a few years and it is not mentioned on the Sinclair website. The label on the product reflects the old company name Sinclair R

[Repeater-Builder] Re: local club needs repeater amp

Kevin, Thanks for the advice. I have at one time or the other seen that amp, and agree that its a workhorse. It would work well for our system. Let me know if you run across one. steve WA4BVO

[Repeater-Builder] Re: local club needs repeater amp

Eric, You really can't comment much about our situation in regards to needing an amplifier unless you know more about the circumstances-- each repeater system is different. As I posted, our receivers FAR out- perform the one transmitter. You can be near full-quieting on receive, but get a ch

[Repeater-Builder] Basic Question - Required Isolation

Hi all, I've been searching old posts and the RB page but haven't found quite what I'm looking for, so I'm resorting to spamming the list :-) My question has to do with how much TX/RX isolation is required for different frequency spacings. I'm assuming that as the TX/RX frequency spacing increas

[Repeater-Builder] 10 meter split site rpt, eqpt recommendations?

Gentlemen With the recent licensing structure changes, 10m meters is going to be open to tech-minus ops like myself. Im kicking around ideas of a split site 10m FM rpt, with a 2 meter repeater as link / dual band core. I had a 6m rpt up back in 98-2001 that suffered from lack of use until a

[Repeater-Builder] CUSHMAN CE-15

Hi, Can I sneak in a question on test equipment. I occasionally see reference to the CE-15. I haven't used a spectrum analyzer very often but I have the opportunity to access a CE-15 and I'm trying to familarize myself with its operation and I wonder about its low frequency operation, such a

[Repeater-Builder] Sinclair Duplexer Question

Does anyone in this group have any information on a Sinclair Radio Laboratories Model Q-305D. This appears to be a rather old bp/br uhf duplexer. The Sinclair website does not list this unit. Any info or a copy of a spec sheet would be much appreciated. Rick Lutzinger KD6ZR Patterson, Geor