[Repeater-Builder] Low Band Micor Mobile as Repeater TX?
Hi Folks, Well, I got the hardline duplexers completed for 6 meters, and after a shakey start, they now work at power. Looks like about 100dB notch & 1.5dB loss through each set of 3 'cans'. Using RG-142 as the inter-can connections, and RG-214 between the TX/RX & duplexer. All the 'business' ends of the hardline duplexer cans are totally shielded. Hooked the antenna port to a dummy load with sampling port (to inject the RX freq), and we got lots of desense. With a Bird inline with the TX input, it shows 80W going in, 0 reflected. 50 W coming out of the antenna port. The match looks good. Am using a micor repeater shelf for the RX, but using a converted micor mobile as the TX. It is located above the RX. All shields are in place, both TX & RX. I guess the basic question is whether using a Micor Mobile is a good choice. (it was chosen as it was available) I cranked down the power to 5 watts (using one of the caps on the PA). Granted, sometimes these guys get unstable doing it that way, but the desense seemed just as bad. Perhaps I just introduced a different desense cause by trying it. Anyhow, just curious about the viability of using the micor mobile as a TX in repeater service. I understand about heatsink/ heat issues, and plan to run it at reduced power (per motorola tuning sheet). Thanks, Tim W5FN
Re: [Repeater-Builder] Low Band Micor PA
Hi all, Just went out to where I've got the VHF repeater stored, and it is a TLD1694E, 162-174mhz. Guess it might not be all that useful, due to the high split. My transmit pair is 53.150, so would have to re-work the harmonic filter & maybe a few other things. Anyhow, let me know if there's a remote amount of interest! :-) thanks, Tim
Re: [Repeater-Builder] Low Band Micor PA
The Low Pass Filter will likely need to be re-worked or you stand a good chance of burning it up - depending on your 6-meter TX frequency. Chuck WB2EDV - Original Message - From: "Eric Lemmon" To: Sent: Thursday, June 03, 2010 10:27 PM Subject: RE: [Repeater-Builder] Low Band Micor PA > Tim, > > The more-or-less standard Micor low-band continuous-duty PA is rated at > 100 > watts, and came in four models: > > TLB1411 25-30 MHz > TLB1412 30-36 MHz > TLB1413 36-42 MHz > TLB1414 42-50 MHz > > There are significant differences between these models, and they cannot be > used very far out of their respective band limits. Which PA are you > seeking? > > What is the complete model number of the VHF PA you have to trade? > > 73, Eric Lemmon WB6FLY > > > -Original Message- > From: Repeater-Builder@yahoogroups.com > [mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301 > Sent: Thursday, June 03, 2010 6:46 AM > To: Repeater-Builder@yahoogroups.com > Subject: [Repeater-Builder] Low Band Micor PA > > > > Hi Folks, > > Anybody have a Micor Low Band PA - Repeater/Base > station type? Not sure if they came in lower > power versions, but looking for a continuous > duty. > > Will swap a VHF continuous duty for it. > > Looks like I'm getting some cans for the 6 mtr > repeater & will now be able to be at a single site, > so want to put it all in a single box. Already have > the RX, exciter, remote control chassis & PS. > > Thanks, > > Tim W5FN
RE: [Repeater-Builder] Low Band Micor PA
Tim, The more-or-less standard Micor low-band continuous-duty PA is rated at 100 watts, and came in four models: TLB1411 25-30 MHz TLB1412 30-36 MHz TLB1413 36-42 MHz TLB1414 42-50 MHz There are significant differences between these models, and they cannot be used very far out of their respective band limits. Which PA are you seeking? What is the complete model number of the VHF PA you have to trade? 73, Eric Lemmon WB6FLY -Original Message- From: Repeater-Builder@yahoogroups.com [mailto:repeater-buil...@yahoogroups.com] On Behalf Of tahrens301 Sent: Thursday, June 03, 2010 6:46 AM To: Repeater-Builder@yahoogroups.com Subject: [Repeater-Builder] Low Band Micor PA Hi Folks, Anybody have a Micor Low Band PA - Repeater/Base station type? Not sure if they came in lower power versions, but looking for a continuous duty. Will swap a VHF continuous duty for it. Looks like I'm getting some cans for the 6 mtr repeater & will now be able to be at a single site, so want to put it all in a single box. Already have the RX, exciter, remote control chassis & PS. Thanks, Tim W5FN
[Repeater-Builder] Low Band Micor PA
Hi Folks, Anybody have a Micor Low Band PA - Repeater/Base station type? Not sure if they came in lower power versions, but looking for a continuous duty. Will swap a VHF continuous duty for it. Looks like I'm getting some cans for the 6 mtr repeater & will now be able to be at a single site, so want to put it all in a single box. Already have the RX, exciter, remote control chassis & PS. Thanks, Tim W5FN
Re: [Repeater-Builder] Low Band Micor mobile not making power
On Thu, 18 Mar 2010, Tim Ahrens wrote: > I asked the guy I got them from if he had an extra exciter, as one of > them seemed to have some parts missing. > > Anyhow, he said "oh, that maybe one that was setup for digital". > Evidently they came from an oil company, and they were a bit > 'special'. Early DVP and DES systems used a 16KHz-wide data signal. To repeat these through the repeater required re-clocking modules. That may be what you're seeing, that or a DCS(DPL)-type module. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Low Band Micor mobile not making power
Well, things are starting to get muddy! Since I was having some issues with both of the exciters, I started looking closely at them, and things didn't seem to be quite correct. I asked the guy I got them from if he had an extra exciter, as one of them seemed to have some parts missing. Anyhow, he said "oh, that maybe one that was setup for digital". Evidently they came from an oil company, and they were a bit 'special'. Speaking of special, the number is TLB 8164 A2 SP4. It's really acting strange when I put a reed in it, and it doesn't do well with audio either. Just wonderin' if anybody has a clue about the SP4 & what it may be. Thanks, Tim
Re: [Repeater-Builder] Low Band Micor mobile not making power
Hi All, Thanks for the info. I had made about half the recommended mods here on RB... making the mods where the tuning didn't quite make it. I'll go and make the rest of the mods & see what kind of power I can get out of it. I understand about the 'reduced-power' issues, so will re-tune it as the manual states for reduced power. I think it said 43 watts was the recommended. Thanks again! Tim
Re: [Repeater-Builder] Low Band Micor mobile not making power
I would run it as is if it does not overheat and look for a Syntor X they are good to go on six for full power. tom wd8chl wrote: On 3/18/2010 10:45 AM, Kevin Custer wrote: tahrens301 wrote: Hi all, Working on a micor mobile to be used as a repeater (only using the exciter/control board/PA). Was going through it, and am only able to get about 75 watts out of it with the exciter on 53.7. The exciter is putting out 0.3 watts... a bit more than most exciters I've seen, but they were high band. I'd expect to only see 75 watts out of a 110 watt PA if you only have 300 mW of drive. Low Band exciters usually have about 600 mW leaving the exciter on frequencies within original specification, and it's common to see 150 watts out of a Low Band PA. Under drive can be a bad thing. I'd look at it with a spectrum analyzer and make sure it isn't spurious because of the 3 dB of under drive. It probably isn't, but I'd check it anyway... Kevin The other thing I would do is if you have the original tx channel element, or can get one that's in the right area, like around 47-49 MHz, put that in and tune it up there and see what you get, if you didn't do that when you first got it. If it makes spec, then it might be time for some mods or something. I know someone who put a Micor mobile on 53.77. It never did make full power up there (it was good on the original freq., 47-ish), and was set to run at abt 50W I think. At that point, it was clean, and stayed cool with a fan. 53.7 is pretty high for one of those. Yahoo! Groups Links
Re: [Repeater-Builder] Low Band Micor mobile not making power
On 3/18/2010 10:45 AM, Kevin Custer wrote: > tahrens301 wrote: >> Hi all, >> >> Working on a micor mobile to be used as a >> repeater (only using the exciter/control board/PA). >> >> Was going through it, and am only able to get >> about 75 watts out of it with the exciter on 53.7. >> >> The exciter is putting out 0.3 watts... a bit more >> than most exciters I've seen, but they were high band. > > > I'd expect to only see 75 watts out of a 110 watt PA if you only have > 300 mW of drive. Low Band exciters usually have about 600 mW leaving > the exciter on frequencies within original specification, and it's > common to see 150 watts out of a Low Band PA. > > Under drive can be a bad thing. I'd look at it with a spectrum analyzer > and make sure it isn't spurious because of the 3 dB of under drive. It > probably isn't, but I'd check it anyway... > > Kevin The other thing I would do is if you have the original tx channel element, or can get one that's in the right area, like around 47-49 MHz, put that in and tune it up there and see what you get, if you didn't do that when you first got it. If it makes spec, then it might be time for some mods or something. I know someone who put a Micor mobile on 53.77. It never did make full power up there (it was good on the original freq., 47-ish), and was set to run at abt 50W I think. At that point, it was clean, and stayed cool with a fan. 53.7 is pretty high for one of those.
Re: [Repeater-Builder] Low Band Micor mobile not making power
tahrens301 wrote: > Hi all, > > Working on a micor mobile to be used as a > repeater (only using the exciter/control board/PA). > > Was going through it, and am only able to get > about 75 watts out of it with the exciter on 53.7. > > The exciter is putting out 0.3 watts... a bit more > than most exciters I've seen, but they were high band. I'd expect to only see 75 watts out of a 110 watt PA if you only have 300 mW of drive. Low Band exciters usually have about 600 mW leaving the exciter on frequencies within original specification, and it's common to see 150 watts out of a Low Band PA. Under drive can be a bad thing. I'd look at it with a spectrum analyzer and make sure it isn't spurious because of the 3 dB of under drive. It probably isn't, but I'd check it anyway... Kevin
Re: [Repeater-Builder] Low Band Micor mobile not making power
Kris Kirby wrote: > IIRC Motorola usually used about 1W at the exciter to drive the PA to full > power. > > -- > Kris Kirby, KE4AHR > Disinformation Analyst Not on the MICOR line. All are 400 mW out of the exciter regardless of band. Low Band exciters usually make 600 mW, but their spec is 400 mW. UHF Stations takes the 400 mW at the VHF exciter and makes 1 to 2 watts for the PA as a function of the tripler. The UHF MICOR mobile is similar, but different. Kevin
Re: [Repeater-Builder] Low Band Micor mobile not making power
Oops, forgot to mention that this was directly out of the amp. The filter has been removed. (I already spread out the turns, but for this I wanted to make sure it wasn't affecting the power). Tim
Re: [Repeater-Builder] Low Band Micor mobile not making power
On Thu, 18 Mar 2010, tahrens301 wrote: > Working on a micor mobile to be used as a repeater (only using the > exciter/control board/PA). > > Was going through it, and am only able to get about 75 watts out of it > with the exciter on 53.7. > > The exciter is putting out 0.3 watts... a bit more than most exciters > I've seen, but they were high band. > > The tags on the PA cover indicate over 100 watts were once measured. > > Made most of the capacitor mods to the exciter, but it tunes up easy. > (slugs not in wierd places). > > Oh, not gonna run it at full power, but wanted to make sure it was up > to snuff. IIRC Motorola usually used about 1W at the exciter to drive the PA to full power. 1.125W (+33dBm) will put a Mitrek amp up to 125W under certain conditions. The Micor may have a tripler though. -- Kris Kirby, KE4AHR Disinformation Analyst
Re: [Repeater-Builder] Low Band Micor mobile not making power
How much current is it pulling? At 53.7 I suspect you are well into the roll off on the output low pass filter. I forget exactly how it's implemented in this case. On 3/18/2010 9:06 AM, tahrens301 wrote: > > > Hi all, > > Working on a micor mobile to be used as a > repeater (only using the exciter/control board/PA). > > Was going through it, and am only able to get > about 75 watts out of it with the exciter on 53.7. > > The exciter is putting out 0.3 watts... a bit more > than most exciters I've seen, but they were high band. > > The tags on the PA cover indicate over 100 watts > were once measured. > > Made most of the capacitor mods to the exciter, but > it tunes up easy. (slugs not in wierd places). > > Oh, not gonna run it at full power, but wanted to > make sure it was up to snuff. > > Thanks, > > Tim W5FN > > -- mailto:o...@ozindfw.net Oz POB 93167 Southlake, TX 76092 (Near DFW Airport)
[Repeater-Builder] Low Band Micor mobile not making power
Hi all, Working on a micor mobile to be used as a repeater (only using the exciter/control board/PA). Was going through it, and am only able to get about 75 watts out of it with the exciter on 53.7. The exciter is putting out 0.3 watts... a bit more than most exciters I've seen, but they were high band. The tags on the PA cover indicate over 100 watts were once measured. Made most of the capacitor mods to the exciter, but it tunes up easy. (slugs not in wierd places). Oh, not gonna run it at full power, but wanted to make sure it was up to snuff. Thanks, Tim W5FN
RE: [Repeater-Builder] Low Band Micor Key probelm
Jeff,
I found that one of the transistors got bent over and had the legs
touching, I bent it back and it worked fine! Oh well, now I have a bunch of
extra cards.
Trevor
-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of Jeff DePolo
Sent: Thursday, June 07, 2007 8:42 AM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Low Band Micor Key probelm
I don't have a control shelf manual ("orange book") here for the Micor, but
one other thing to check is the PL encoder on the transmitter (if it has
one). If the keying transistor or other logic on that board got hosed, it
could "latch on", keeping the transmitter keyed.
--- Jeff
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Trevor
> Sent: Wednesday, June 06, 2007 8:00 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Low Band Micor Key probelm
>
> I have been in the proccess of converting my low-band Micor repeater
> to 6M use, I got the reciever and transmitter converted over, and
> semi-retuned the PA when it stoped keying, afer checking around I
> cleaned the contacts on the Station Control (TLN4635B) F1-PL
> (TLN4636A) and Squelch (TLN4662APR Converted for external repeater
> modification per wa8dbw) modules. Then it started working agian.
> BUT... While aliging the PA I was getting low power out, so I thought
> I would check the voltage on the keyed a- line (I didn't have a meter
> set, so I was using my multimeter in 2000uA mode) but I forgot to
> switch the multimeter out of uA and shorted the Keyed a- to a+. Then
> the repeater wouldn't unkey, unless I pulled one of the modules. I
> played around for a bit and determined, if I have the Squelch module
> out, and I push the XMIT switch on the control module it would key and
> stay keyed. If I put in the Squelch module and keyed a HT it would
> lock on.After digging for a couple weeks (and getting new manuals) I
> decied ordered new Station control, F1-PL modules. (It was a lot pull
> with a new F1-PL, F1, 2 control and a couple others) Today I put them
> in and it does the same.
>
> What should I look at next?
>
>
> Thanks!
> Trevor KG6MDW
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.472 / Virus Database: 269.8.11/837 - Release
> Date: 6/6/2007 2:03 PM
>
>
Yahoo! Groups Links
__ NOD32 2312 (20070606) Information __
This message was checked by NOD32 antivirus system.
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RE: [Repeater-Builder] Low Band Micor Key probelm
I don't have a control shelf manual ("orange book") here for the Micor, but
one other thing to check is the PL encoder on the transmitter (if it has
one). If the keying transistor or other logic on that board got hosed, it
could "latch on", keeping the transmitter keyed.
--- Jeff
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of Trevor
> Sent: Wednesday, June 06, 2007 8:00 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Low Band Micor Key probelm
>
> I have been in the proccess of converting my low-band Micor repeater
> to 6M use, I got the reciever and transmitter converted over, and
> semi-retuned the PA when it stoped keying, afer checking around I
> cleaned the contacts on the Station Control (TLN4635B) F1-PL
> (TLN4636A) and Squelch (TLN4662APR Converted for external repeater
> modification per wa8dbw) modules. Then it started working agian.
> BUT... While aliging the PA I was getting low power out, so I thought
> I would check the voltage on the keyed a- line (I didn't have a meter
> set, so I was using my multimeter in 2000uA mode) but I forgot to
> switch the multimeter out of uA and shorted the Keyed a- to a+. Then
> the repeater wouldn't unkey, unless I pulled one of the modules. I
> played around for a bit and determined, if I have the Squelch module
> out, and I push the XMIT switch on the control module it would key and
> stay keyed. If I put in the Squelch module and keyed a HT it would
> lock on.After digging for a couple weeks (and getting new manuals) I
> decied ordered new Station control, F1-PL modules. (It was a lot pull
> with a new F1-PL, F1, 2 control and a couple others) Today I put them
> in and it does the same.
>
> What should I look at next?
>
>
> Thanks!
> Trevor KG6MDW
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
> No virus found in this incoming message.
> Checked by AVG Free Edition.
> Version: 7.5.472 / Virus Database: 269.8.11/837 - Release
> Date: 6/6/2007 2:03 PM
>
>
[Repeater-Builder] Low Band Micor Key probelm
I have been in the proccess of converting my low-band Micor repeater to 6M use, I got the reciever and transmitter converted over, and semi-retuned the PA when it stoped keying, afer checking around I cleaned the contacts on the Station Control (TLN4635B) F1-PL (TLN4636A) and Squelch (TLN4662APR Converted for external repeater modification per wa8dbw) modules. Then it started working agian. BUT... While aliging the PA I was getting low power out, so I thought I would check the voltage on the keyed a- line (I didn't have a meter set, so I was using my multimeter in 2000uA mode) but I forgot to switch the multimeter out of uA and shorted the Keyed a- to a+. Then the repeater wouldn't unkey, unless I pulled one of the modules. I played around for a bit and determined, if I have the Squelch module out, and I push the XMIT switch on the control module it would key and stay keyed. If I put in the Squelch module and keyed a HT it would lock on.After digging for a couple weeks (and getting new manuals) I decied ordered new Station control, F1-PL modules. (It was a lot pull with a new F1-PL, F1, 2 control and a couple others) Today I put them in and it does the same. What should I look at next? Thanks! Trevor KG6MDW
[Repeater-Builder] Low Band MICOR
Does anyone have a MICOR Low Band Low Split or Medium Split thay would like to sell. Gregory Gordon AC6VJ ([EMAIL PROTECTED]) Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
