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Re: Andrew 7/8" Hardline Connector Needed
开云体育? Matt AL0R ? From: [email protected] <[email protected]> On Behalf Of MIke Ryan via groups.io
Sent: Friday, March 14, 2025 20:43 To: [email protected] Subject: [repeater-builder] Andrew 7/8" Hardline Connector Needed ? I have a length of the older SOLID CENTER CONDUCTOR 7/8” hardline and need one connector. I am not particular about the gender but an “N” female would be most useful. If one is available please contact me off list with your price including shipping to 34221. I would like to have this mid week next week if possible. If you do not HAVE a connector but know what MODEL NUMBER this type is, it might also be helpful. The cable is NOT the very old SPIRAL type but is the concentric circle type solid center. Thanks in advance.
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Andrew 7/8" Hardline Connector Needed
开云体育I have a length of the older SOLID CENTER CONDUCTOR 7/8” hardline and need one connector. I am not particular about the gender but an “N” female would be most useful. If one is available please contact me off list with your price including shipping to 34221. I would like to have this mid week next week if possible. If you do not HAVE a connector but know what MODEL NUMBER this type is, it might also be helpful. The cable is NOT the very old SPIRAL type but is the concentric circle type solid center. Thanks in advance.
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Re: Quantar TFD6512A Preselector Filter
Easiest thing to do is set up one of your service monitors as a signal generator on your desired frequency. I prefer to use the Duplex Out into the receiver antenna jack on the back. From the RX test menu, Set the output port to Duplex Out and then generate a signal at -20dBm or so if you are totally off tune. Set the first tone generator at 1.000 kHz at 3 kHz deviation and set the second tone generator to your PL frequency like 0.123 kHz and at 0.7 kHz deviation. Unmute the receiver by pressing volume up or down on the front panel. Raise or lower the signal level of the generator so you can hear noise in the speaker audio. Adjust the Helicals with a straight screw driver on the front of the receiver for minimum noise on the test tone. Lower the output of the signal generator for more noise in the speaker and repeat tuning. You should be able to get the signal generator down to -117 to -120 to where no more improvement will occur. The alternative is to remove the helical assembly and set up the spectrum analyzer and tracking generator of the service monitor and tune the filter that way. You will need mini UHF to BNC adapters. On Fri, Mar 14, 2025, 17:58 Chris Boone WB5ITT via <setxtelecom=[email protected]> wrote:
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Re: Quantar TFD6512A Preselector Filter
VHF or UHF? I just inject a signal and tune for best Sinad sensitivity in the speaker.. Chris WB5ITT On Fri, Mar 14, 2025, 7:26 PM Jeff Acree via <locustpointlight=[email protected]> wrote:
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Re: Running a Repeater on a FM Broadcast Tower
Circulator, which is a passive element allowing the passing of RF signals only in one direction, is a key element in almost any RF circuit technology.? An isolator is based on a circulator, having a dummy load on the reverse way port, thus isolating the RF signal passage truly to one direction. Usually circulators or isolators come in one- or two-pack sets so that there are one or two circulators in a chain. Double-pack-isolators have better isolation in general as there are two sets of dummy loads in row in the reverse path preventing signal entering back to the port where RF is not wanted to enter. Such cases where RF is not welcome into the transmitter output port are exactly situations where there are multiple strong signals present, and an unwanted signal entering the transmitter amplifier could generate IMD and unwanted mixing signal results. Isolators also improve?RF circuit matching, requiring of course that the isolators are tuned to the frequency used. In repeater systems isolators should be always used in the transmitter chain, they are a very good method of getting rid of many difficult-to-solve sporadic issues. 73, Erik OH2LAK N5LAK TF3EY On Fri, 14 Mar 2025 at 23:24, Chris Boone WB5ITT via <setxtelecom=[email protected]> wrote:
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Quantar TFD6512A Preselector Filter
Friends,
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I need to retune the subject preselector and was wondering if there are any procedures someone could share or point me to.? I have a HP8320B and a HP8935 to do the work with, but I could not find any procedures in either the Instruction manual or the service manual.? Perhaps I overlooked it.?
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Thanks!
Jeff KC8VFN |
19 inch rack mount cabinet for sale.
Hi everyone, I have a large, unable to be shipped, approximately 7 foot tall open rack with 19 inch rack rails that I'm thinking about selling. Would like something a little bit smaller and enclosed if possible. Wonder if anyone is interested in swapping a smaller one for this large one? It would have to be picked up in Janesville Wisconsin Since it's unable to be shipped.
If anyone wants to pick it up for purchase, $70, but I would also be willing to swap even up for a smaller one. This rack even has a built-in power strip for equipment power obviously :-). Chad Nelson WI9HF/WRPL979 Janesville Wisconsin 608-754-8671 Send from my spectrum iPhone 16. |
Re: Running a Repeater on a FM Broadcast Tower
开云体育
? A circulator becomes an isolator when only two ports are passing the desired RF and the third port is terminated in a reject load.? Or to say it another way, a circulator is one of two components required to make an isolator.? Isolators only allow RF to flow between two adjacent ports, the third port being a dead end. ? Circulators which are not in isolator service are often used for transmit/receive RF steering such as in microwave waveguide branching networks.? The circulators are oriented such that, for transmitters, RF flows from a given transmitter toward the antenna, and oriented the other way so RF flows from the antenna toward a given receiver, with transmitters and receivers each having single-channel waveguide filters in-line between the radio and the circulator.? Each filter presents a poor match to any/all other frequencies other than the channel they are tuned for, thus keeping off-channel RF flowing around the circulator until it reaches the intended port (either up the stack toward the antenna for transmitters, or down the stack toward receivers or the final termination at the bottom). ? ??????????????? ??????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A |
Re: Running a Repeater on a FM Broadcast Tower
Circulators are used all the time in LMR...Combiners have them, I've used them on conventional systems where IMD was a problem...never called them isolators in my 50+ years of LMR.. Chris WB5ITT? On Fri, Mar 14, 2025, 4:09 PM Matt via <al0r=[email protected]> wrote:
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Re: Running a Repeater on a FM Broadcast Tower
开云体育Isolators are only used on the tx side. ? An isolator is generally a 3 port circulator where one port is terminated. In some systems, such as radar, a circulator can be used to allow a transmitter and receiver to share the same antenna. It is possible to have more than 3 ports on a circulator ? You typically don’t see a circulator in “LMR.” ? You don’t need to tune into any frequency in particular. As mentioned, simply insert a power meter in the line and put a load on the other port. If you want to measure the level at a given frequency, then you’ll need additional equipment. ? As far as what to do… you can trap/stub it, add band pass filtering, or ignore it (if you have equipment that tolerates it.) Why would we do something about it? Because hams are cheap. BpBr duplexers are used, with the owners not understanding that they really aren’t “band pass” as they think they are. Or, notch only duplexers are used, or crappy rf decks. Insert a lot of reasons. ? An actual band pass filter, given adequate separation (i.e., FM broadcast/2m) can kill “all” the signal/voltage from the broadcast transmitter. Only passing the desired band, i.e., 2m, or even a narrower portion. Alternatively, you can trap the broadcast station, cleaning the line for all the downstream users, then add a band pass too, shielding your receiver from all kinds of unwanted signals. ? Matt AL0R ? From: [email protected] <[email protected]> On Behalf Of steven harvey via groups.io ? People have mentioned isolator and circulator any brand better than the other?? ? ? If I remember correctly.? ?The isolator are used on the TX and RX side of the repeater ports to the duplexer? ? The circulator is used after it combines on the duplexer output to go up the antenna? ? Also it was stated to bring a watt meter to look for potential RF energy coming down the cable.? ? I'm assuming you'll want too look for the RF on the repeater frequency or the radio station frequency?? ?What do you do if you find such a issue?? ? Appreciate everyone help on.? Lot's of good information. ? Thanks Steven H N8RLW? ? ? |
Re: Win10 CDM/HT Out of Band and Region Code Mods
One of the 6 meter repeater groups in SoCal has all of the hardware mods figured out for moving the CDM1250 low band up to 54 MHz with no degradation but they don't want it put out on the net for an unknown reason which I didn't push them on since they provided me the mods in person during a visit last year.
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while driving thru LA last summer I dropped by a hams QTH and we did the mod to my CDM1250 for 6 meters on the spot so the documentation was not supplied to me.
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As mentioned I had my cdm1250 6 meter modified on site and it works across 39 to 54 MHz with minimal Sens loss and 70 watts output on all of 6 meters.
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I use it for CHP receive and 6 meter use while driving thru SoCal from my Oregon QTH to My Prescott AZ Qth and the radio works very well.
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I just picked up a HT1250 tlast fall and I used the waris Python code which we used on my CDM1250 mobile to get OOB up to 54 MHz on both of my radios.
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My Ht1250 works all the way up to 54 MHz without any mods and any sensitivity losses and 6.5 watts output. |
Re: Running a Repeater on a FM Broadcast Tower
People have mentioned isolator and circulator any brand better than the other?? ?
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If I remember correctly.? ?The isolator are used on the TX and RX side of the repeater ports to the duplexer?
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The circulator is used after it combines on the duplexer output to go up the antenna?
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Also it was stated to bring a watt meter to look for potential RF energy coming down the cable.? ? I'm assuming you'll want too look for the RF on the repeater frequency or the radio station frequency?? ?What do you do if you find such a issue??
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Appreciate everyone help on.? Lot's of good information.
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Thanks
Steven H
N8RLW?
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Re: fs: AnritsuSitemaster S331l
开云体育Robert How about $1,000.00 plus shipping? ? Regards, ? Charles F. Adams Industrial Communications Co. 121 N Sitgreaves Street Easton, PA 18042 Office 610-253-1214 Cell 610-360-0050 Fax 610-253-4504 ? From: [email protected] <[email protected]>
On Behalf Of Charles Adams via groups.io
Sent: Friday, March 14, 2025 10:32 AM To: [email protected] Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l ? 3qqqqdqaa21 ? From:
[email protected] <[email protected]> on behalf of Part 15 Engineer via groups.io <kc8gpd@...> ? Yes, they are selling for more than I'm asking on ebay plus shipping. I have to pay for my quantar I just bought from sunny communications or the anritsu andnmy other gear wouldn't be up for sale. I also have other stuff for sale not listed here as it's broadcast related and has nothing to do with lmr or repeaters. I will also have a Kenwood 851 coming for sale? when it gets replaced with the quantar as well as a micromagic 150W reject only duplexer. If i can sell this other equipment and make back what im out of pocket for these upgrades then the Kenwood will be donated to the local ham club for a mobile command / site repeater. The local ham guy in charge of ares wants to incorporate gmrs into ares and the local EM plan. I'm trying to make that main repeater the best it can be and spared no expense. I'm on a fixed income and the fmrs repeater trustee and it's not under a 501c so I can't accept tax free donations I'm doing this entirely on my own and out of my own pocket and how I do that is buying and selling to support the repeater stuff. Thanks Robert ? On Tue, Mar 11, 2025, 7:03?AM Matt via <al0r=[email protected]> wrote:
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Re: fs: AnritsuSitemaster S331l
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Charles Adams
Industrial Communications Co.d
Mobile 610-360-0050?
Office 610-253-1214?
cadams@...
From: [email protected] <[email protected]> on behalf of Part 15 Engineer via groups.io <kc8gpd@...>
Sent: Tuesday, March 11, 2025 8:35:18 AM To: [email protected] <[email protected]> Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l ?
Re: anritsu: only accessories included are the power supply / charger and carry case. Osl and calibration cable are easily available on ebay. The person I bought this from never sent the accessories and it's been afew moths so I suspect I will not be seeing any accessories but if the osl and calibration cable should arrive I will forward to buyer free of charge. Thanks Robert On Tue, Mar 11, 2025, 6:27?AM Part 15 Engineer via
<kc8gpd=[email protected]> wrote:
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Re: fs: AnritsuSitemaster S331l
开云体育3qqqqdqaa21
Charles Adams
Industrial Communications Co.
Mobile 610-360-0050?
Office 610-253-1214?
cadams@...
From: [email protected] <[email protected]> on behalf of Part 15 Engineer via groups.io <kc8gpd@...>
Sent: Tuesday, March 11, 2025 9:17:03 AM To: [email protected] <[email protected]> Subject: Re: [repeater-builder] fs: AnritsuSitemaster S331l ?
Yes, they are selling for more than I'm asking on ebay plus shipping. I have to pay for my quantar I just bought from sunny communications or the anritsu andnmy other gear wouldn't be up for sale. I also have other stuff for sale not listed here as it's broadcast related and has nothing to do with lmr or repeaters. I will also have a Kenwood 851 coming for sale? when it gets replaced with the quantar as well as a micromagic 150W reject only duplexer. If i can sell this other equipment and make back what im out of pocket for these upgrades then the Kenwood will be donated to the local ham club for a mobile command / site repeater. The local ham guy in charge of ares wants to incorporate gmrs into ares and the local EM plan. I'm trying to make that main repeater the best it can be and spared no expense. I'm on a fixed income and the fmrs repeater trustee and it's not under a 501c so I can't accept tax free donations I'm doing this entirely on my own and out of my own pocket and how I do that is buying and selling to support the repeater stuff. Thanks Robert On Tue, Mar 11, 2025, 7:03?AM Matt via <al0r=[email protected]> wrote:
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Re: Running a Repeater on a FM Broadcast Tower
Pre 1992.. before I left Detroit, one Amateur placed a 440 repeater on the side of an FM tower.. Antenna wise, He installed a pair of 4 (maybe 8) bay stacked dipoles in cardiod pattern? opposite sides of the tower..
Think of it as a cardiod pattern East and a cardiod pattern West.. totally omnidirectional except for a slight theoretical notch in the pattern North and South.
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It had tremendous coverage, but Detroit is pretty flat..? with elevation variation of only 75 feet in 3-4 counties. |
Re: Motorola R2600 VGA Output
On 2025-03-13 11:44 p.m., k9wkj via groups.io wrote:
Ramesh<-- Thanks, Wayne.? Hope I can get my hands on one! - the AL1716W did not pan out.? (I did test the monitor with a desktop computer and confirmed that the monitor does work... and was able to get the OSD menu top pop up [which only activates when there's a valid video signal, but there is no option to change display resolution]). Appreciate your time and guidance. Ramesh, VA3UV, WA3UV |
Re: MTR2000 PL Decode question
Hi Can you please share the places of the configs ?? Take care 73s ct2gnh - Paulo Lobo Don Wisdom KD7WKF via <dwisdom-lists=[email protected]> escreveu (quinta, 13/03/2025 à(s) 14:46): All, --
Paulo Lobo |
Re: Win10 CDM/HT Out of Band and Region Code Mods
Sounds good. Whenever I get a chance, I'll get something typed up and send it to you. Might be a little bit, my kids have a lot of school activities and they're keeping me pretty busy at the moment. I just wanted to share with yall where I found things on my Windows 10 machine to do the CPS mods.
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Terry KM5UQ |