[Repeater-Builder] Re: Motorola EP450

[jistabout]

Mark, you might try asking on the Batlabs forum:

http://batboard.batlabs.com 

- Darrell/KA7BTV

Re: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[Bob M.]

The problem with buying NOS caps is that they might have been new in 1980. 
They've been sitting on the shelf for all this time, and might not be much 
better than what you have now (unless yours are shorted).

Bob M.
==
--- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote:

> From: kk2ed <[EMAIL PROTECTED]>
> Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID
> To: Repeater-Builder@yahoogroups.com
> Date: Friday, September 19, 2008, 12:48 AM
> Thanks for the reply/suggestion. A stud mount of greater
> current 
> rating may be the way to go. I could just drill out of the
> existing 
> mounting holes and use the stud mount and a nut/washer
> combo. 
> 
> However, after googling till my eyes fell asleep, I found a
> few 
> sources on the web for the original diode - which turns out
> to be a 
> 1N3492R. So that takes care of the diodes - 
> 
> Now, on to the caps.  I mistyped last evening, as they are
> 17500uf 
> and not 27000uf.  Not as much luck, but I did find one
> supplier 
> listing NOS Moto numbered caps on their web site. I
> requested 
> pricing. Depending on the price, I will either buy them or
> retrofit a 
> newer style cap.  
> 
> Eric
> KE2D
> 
> 
> 
> --- In Repeater-Builder@yahoogroups.com, Captainlance 
> <[EMAIL PROTECTED]> wrote:
> >
> > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE
> "REVERSE" 
> POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I
> HAVE USED 
> THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE
> CURRENT 
> THAN THE FACTORY ONES DO.
> > LANCE N2HBA
> >   - Original Message - 
> >   From: kk2ed 
> >   To: Repeater-Builder@yahoogroups.com 
> >   Sent: Thursday, September 18, 2008 9:10 AM
> >   Subject: [Repeater-Builder] Re: Micor TPN1110A power
> supply parts 
> ID
> > 
> > 
> >   The diodes CR1 and CR2 are compression-fitted style
> rectifier 
> diodes 
> >   that are pressed into a rectangle stock of aluminum,
> and the 
> aluminum 
> >   is then secured to the chassis via two screws. The
> diodes have 
> one 
> >   solder lug terminal. 
> > 
> >   The service manual only lists the Motorola part #;
> no specs or 
> >   industry-standard part # is given. Same on the caps.
> Only spec 
> given 
> >   is 27,000 uf @ 20wvdc. 
> > 
> >   I did a quick search of Mouser and DigiKey, and was
> unable to 
> find 
> >   any chassis-mount style caps. Anyone find something
> suitable that 
> can 
> >   be re-secured to the ps's chassis via new rivets
> or screws? I 
> know I 
> >   can just solder in any cap that meets electrical
> specs, but I 
> would 
> >   like the caps to be secure and not have the ps
> become a fire 
> hazard 
> >   waiting to happen!
> > 
> >   The power supply was still sitting in my truck last
> night. When I 
> get 
> >   a break today I will take it apart further and see
> if I can find 
> a 
> >   part # stamped on the diodes and caps that might
> indicate what 
> the 
> >   real part # is. While I was at the repeater site
> yesterday I 
> thought 
> >   I saw a 1N stamped on the diodes. 
> > 
> >   I would have thought that there would have been
> someone here on 
> the 
> >   list that has repaired one of these supplies before,
> so that is 
> why I 
> >   asked. 
> > 
> >   Eric
> >   KE2D


  

[RE][Repeater-Builder] Motorola EP450

[Givan George]

Mark,
The EP450 is the equivalent of the Motorola CP200 or so. It is programmed with 
CPS 
The EP450 is for the Latin America market.

Regards

Givan





-[ Received Mail Content ]--

 Subject : [Repeater-Builder] Motorola EP450

 Date : Fri, 19 Sep 2008 00:17:15 -0500

 From : "Mark" <[EMAIL PROTECTED]>

 To : 


I'm looking for info on this radio, such as what models it might be
"equivalent to", etc. A friend of mine provided me with one, and I'm
curious to get it working. His company received them from one of their
plants in Central America with the idea of using them here, but when they
found out the radios were not type accepted they tossed them. 

 

All I got was the radio itself, so eventually I'll be looking for a charger
and possibly new battery. that is IF I can get this thing programmed and
working on the 70cm band.

 

I realize this radio is not type accepted by the FCC, but for use in the
Amateur bands this is not an issue. Any suggestions and assistance are
appreciated.

 

Mark - N9WYS

RE: [Repeater-Builder] Motorola EP450

[n9wys]

Thanks, Givan!  

 

That’s the info I was looking for – now knowing that, I’m hoping that the CP200 
CPS will program them…

 

Mark – N9WYS

 

From: Repeater-Builder@yahoogroups.com  On Behalf Of Givan George


Mark,
The EP450 is the equivalent of the Motorola CP200 or so. It is programmed with 
CPS 
The EP450 is for the Latin America market.

Regards

Givan

-[ Received Mail Content ]--
Subject : [Repeater-Builder] Motorola EP450
Date : Fri, 19 Sep 2008 00:17:15 -0500
>From : "Mark" n9wys
To : 

I'm looking for info on this radio, such as what models it might be 
"equivalent to", etc. A friend of mine provided me with one, and I'm 
curious to get it working. His company received them from one of their 
plants in Central America with the idea of using them here, but when they 
found out the radios were not type accepted they tossed them. 

All I got was the radio itself, so eventually I'll be looking for a charger 
and possibly new battery. that is IF I can get this thing programmed and 
working on the 70cm band. 

I realize this radio is not type accepted by the FCC, but for use in the 
Amateur bands this is not an issue. Any suggestions and assistance are 
appreciated. 

Mark - N9WYS 

 

RE: [Repeater-Builder] Re: Motorola EP450

[n9wys]

Just did.  thanks for reminding me, Darrell.

 

From: Repeater-Builder@yahoogroups.com  On Behalf Of jistabout

Mark, you might try asking on the Batlabs forum:

http://batboard.batlabs.com

- Darrell/KA7BTV

RE: [Repeater-Builder] Motorola EP450

[Givan George]

The software for the CP200 may not program the EP450. You may the the Region 
Not Supported error message.
But then you try and see what happens.

Givan





-[ Received Mail Content ]--

 Subject : RE: [Repeater-Builder] Motorola EP450

 Date : Fri, 19 Sep 2008 08:58:46 -0500

 From : "n9wys" <[EMAIL PROTECTED]>

 To : 


Thanks, Givan! 

 

That’s the info I was looking for – now knowing that, I’m hoping that the CP200 
CPS will program them…

 

Mark – N9WYS

 

From: Repeater-Builder@yahoogroups.com On Behalf Of Givan George


Mark,
The EP450 is the equivalent of the Motorola CP200 or so. It is programmed with 
CPS 
The EP450 is for the Latin America market.

Regards

Givan

-[ Received Mail Content ]--
Subject : [Repeater-Builder] Motorola EP450
Date : Fri, 19 Sep 2008 00:17:15 -0500
>From : "Mark" n9wys
To : 

I'm looking for info on this radio, such as what models it might be 
"equivalent to", etc. A friend of mine provided me with one, and I'm 
curious to get it working. His company received them from one of their 
plants in Central America with the idea of using them here, but when they 
found out the radios were not type accepted they tossed them. 

All I got was the radio itself, so eventually I'll be looking for a charger 
and possibly new battery. that is IF I can get this thing programmed and 
working on the 70cm band. 

I realize this radio is not type accepted by the FCC, but for use in the 
Amateur bands this is not an issue. Any suggestions and assistance are 
appreciated. 

Mark - N9WYS 

 

RE: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[Eric Lemmon]

Eric,

I did some research on those capacitors, and found that the original part
number 2383093G20 is NLA.  However, I noticed that part number 2383093G27 is
still available, and is described as "CAP ALU 17500 -10 +150 20V".  It is
priced on MOL at $ 36.59 each.  I wonder if it is a suitable substitute?
Curiously, I looked at my TPN1106A power supply, and found that it has four
2383093G21 capacitors labeled 20,000 uF 100 V, even though the parts list
for that unit lists the 17,500 uF capacitor 2383093G20.  The 2383093G21,
20,000 uF capacitors are available from Motorola at $ 50.43 apiece.

When I looked up the 1-80739B57 diodes, I found them to be NLA, but the
description is "BD EYLTD".  That doesn't make much sense, unless the diodes
were offered only as an assembly.

73, Eric Lemmon WB6FLY


-Original Message-
From: Repeater-Builder@yahoogroups.com
[mailto:[EMAIL PROTECTED] On Behalf Of kk2ed
Sent: Thursday, September 18, 2008 9:49 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

Thanks for the reply/suggestion. A stud mount of greater current 
rating may be the way to go. I could just drill out of the existing 
mounting holes and use the stud mount and a nut/washer combo. 

However, after googling till my eyes fell asleep, I found a few 
sources on the web for the original diode - which turns out to be a 
1N3492R. So that takes care of the diodes - 

Now, on to the caps. I mistyped last evening, as they are 17500uf 
and not 27000uf. Not as much luck, but I did find one supplier 
listing NOS Moto numbered caps on their web site. I requested 
pricing. Depending on the price, I will either buy them or retrofit a 
newer style cap. 

Eric
KE2D

[Repeater-Builder] Motorola 1504 UHF Duplexers

[kd4pbc]

Have several for sale, sold as is, unchecked.

$150 each paypal only

423 791 2823

RE: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[Mike Morris WA6ILQ]

At 09:49 AM 09/19/08, you wrote:
>Eric,
>
>(big chunk cut out)
>
>When I looked up the 1-80739B57 diodes, I found them to be NLA, but the
>description is "BD EYLTD".  That doesn't make much sense, unless the diodes
>were offered only as an assembly.

All 01-part numbers are assemblies, frequently done by outside
contracting firms.
I was told once that several of the contract shops that Moto used
were run by retirees.

There is a breakdown of the first two digits of every Moto part at
)

In that table it says that 01 is "Miscellaneous assemblies (Make or Buy).

In your shoes I'd do what Neil WA6KLA showed me once - I stopped by
the shop one day to pick up a new manual that just came in (a 4-receiver
Micor repeater) and we were going out to lunch - we hopped into his Dodge
Interceptor and as we pulled out of the lot he said we had to do a quick
side trip - we stopped by an alternator shop and dropped off a diode plate.
We had lunch, then picked it up on the way back to the shop.

He commented during lunch that some alternators use the design where
they have the diodes mounted in two plates with some diodes having
"normal" polarity, and the rest are "reverse". Swapping diodes in a plate
was a standard repair trick.  All that the repair guy needed to know when
installing the new diodes is if the lead is the anode, or if the case is
the anode, and the diode current (there are diodes for the 35-50amp
alternators, and there are Diodes for the 100a alternators, and there
are DIODES for the 200a oversize alternators used in special
applications.

He also commented that he had to call around to 7 different shops to
find ones that could swap the diodes in a plate, and that he chose the
particular shop that we went to because they offered to press out the
old diodes and press in new ones the same day, and for a few dollars
extra they'd do it while we waited.  Neil was more interested in lunch
than waiting (and I didn't blame him).

Neil chose to replace both diodes in the power supply, and the total
cost of two new diodes pressed in place plus the "while you wait"
surcharge was cheaper than a new Moto assembly and it was in
your hand the same day.

And no, I don't know if that diode plate that got rebuilt that day
came out of a Micor supply.  It could have been GE, RCA, or
even EFJ.

Mike WA6ILQ

[Repeater-Builder] Repeater Antenna - Looking for an adapter now.

[Ray Brown]

 
  Greetings again from work. We are looking for a CableWave adapter.
Does anyone have a RFS 920242, that's a 15/8" EIA flange - to - N female 
adapter,
the coax is HCC158 / HCAT158.

 
  Ray,   KB0STN
 
 

[Repeater-Builder] Ge Mastr II Squelch

[kb5vjy]

Greetings All,

 
I have just put my second Mastr 2 repeater together and I would like
to see if anyone has any input in the squelch circuit.  I noticed on
both of them that when users un-key their radios, there is about a
half second white noise burst.   I have preformed the M2 Squelch
circuit modification by adding a 4.7uf at 35v cap c630 and replacing
c631 (the second unit had c631 clipped out)  Both of these units were
mobiles now in station cabinets.  Tuned 443.800 and 443.900.

Thanks for the response and 73 de Joe KB5VJY

[Repeater-Builder] Re: Ge Mastr II Squelch

[k6jsi]

--- In Repeater-Builder@yahoogroups.com, "kb5vjy" <[EMAIL PROTECTED]> wrote:
> 
> I have just put my second Mastr 2 repeater together and I would like
> to see if anyone has any input in the squelch circuit.  I noticed on
> both of them that when users un-key their radios, there is about a
> half second white noise burst.   I have preformed the M2 Squelch
> circuit modification by adding a 4.7uf at 35v cap c630 and replacing
> c631 (the second unit had c631 clipped out)

Hi There,

Bite the bullet and install a Micor Squelch Board, like the RLC-MOT.  
You'll be glad you did.  And no more squelch crashes.

Shorty, K6JSI

[Repeater-Builder] Re: Does anyone else think of Power Factor like SWR?

[Bob Witte K0NR]

--- In Repeater-Builder@yahoogroups.com, "kb9bpf" <[EMAIL PROTECTED]> wrote:
>
> Since I'm way more into RF than industrial power distribution, I've 
> always been able to think of "power factor" on the electrical power 
> grid in terms similar to antenna system reflections, which are 
> commonly measured in terms of SWR. After all, both are AC systems 
> where the voltage and current bear a phase relationship to each 
> other. 
> 
> When they are perfectly in phase the power factor is 1.0, and a 60-Hz 
> SWR meter would measure 1:1. When they are out of phase (power factor 
> <1) that SWR meter would read greater than 1:1. I suspect, though I 
> haven't done the math or looked up the specific matahematical 
> definition of power factor, that it would be direcly proportional to 
> the reciprocal of the power factor. And as we know, when that happens 
> the power generating end has more difficulty delivering power 
> efficiently to the load.
> 

A while back I was doing some analysis of power factor to understand
it better and I found that it has a lot in common with SWR. Both are
focused on the issue of power transfer, so I guess we shouldn't be
surprised. The thing they really have in common is for max power with
AC signals, the voltage and current need to be in phase (phase angle
of zero). 

For linear systems with nice sine waves, PF = cos (phase angle)
  where phase angle = the angle between voltage and current sinusoids

Wikipedia has a good explanation of PF at 
http://en.wikipedia.org/wiki/Power_factor

Play around with some typical circuits and you'll find that an SWR of
1 also has voltage and current in phase. Again, not a surprise since
it represents the best power transfer.

This is from memory, so the usual disclaimers apply :-)

 73, Bob K0NR

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[sgreact47]

I looked in my book and find several caps that will replace the 17,500
uF at 20 volts.

Cornell Dubilier 380LX  22,000 at 35 volts
 381LX  22,000 at 35 volts
 DCMC   33,000 at 25 volts 

United Chem-Con  KMH  33,000 at 35 volts   (my favorite)

XiconLS223MIV3545   22,000 at 35 volts   


"Eric Lemmon" <[EMAIL PROTECTED]> wrote:
>
> Eric,
> I did some research on those capacitors, and found that the original
> part number 2383093G20 is NLA.  However, I noticed that part number 
> 2383093G27 is still available, and is described as "CAP ALU 17500
-10 > +150 20V".  

Re: [Repeater-Builder] Repeater Audio War Stories (Story #741)

[Nate Duehr]

Bob M. wrote:

> He was into the hard rock stuff in the 80s and his hearing has been poor 
> since then.

Huh?  What'd you say?!

In my old age, I'll come by my hearing loss honestly...

Even with protection, Lycoming and Continental enginees and slipstream 
noise inside a "spam can" from Cessna, Piper, Mooney, or anyone else... 
is bloody loud.

David Clark "head-clamps" help.  The "noise canceling" varieties are 
nice, but I don't have those -- and I have been reading where they 
provide a very false sense of security, since the sound pressure inside 
the earcups is still as high or higher than outside, the system's just 
canceling out the waves with out of phase ones.

Anyone have any insight into how a canceled wave still has the ability 
to exert pressure?  Odd.

And then of course there's also a bit of that accursed evil "rock and 
roll" in my life... I try to keep it turned down, but every once in a 
while you just have to go with ... I hear if you mix it with a little 
Chopin and Bach, it all works out okay in the end.  (GRIN)

"If it's too loud, you're too old!"

Rock on,

Nate WY0X

(It's always such a debate... listen to the same old conversation on the 
local repeaters again, flip over to the HF bands, or fire up the iPod 
cable equipped stereo in the Jeep for the 27 mile drive home... 
sometimes any of the above can lead to "quality entertainment"... ha! 
But you gotta have a variety with a commute like mine!  AudioBooks 
ripped into the iPod and Podcasts also help pass the time.  Yawn... oh, 
was I supposed to be driving.  Someone wake me up.  The Jeep's on 
autopilot... George is flying.)

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

I think you're probably right.  I found a source for the OEM caps at 
$9 each, but may I'm better off just fabricating some sort of 
mounting mechanism and using newer style caps.

Rather than using 2 17500uf either side of the chokes and four after 
the last choke, could I just use one 40,000uf or so either side, and 
two 40,000 after the last choke?   Unless I'm forgetting something, 
more capacitance can't hurt, no?


Eric
KE2D


--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]> 
wrote:
>
> The problem with buying NOS caps is that they might have been new 
in 1980. They've been sitting on the shelf for all this time, and 
might not be much better than what you have now (unless yours are 
shorted).
> 
> Bob M.
> ==
> --- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote:
> 
> > From: kk2ed <[EMAIL PROTECTED]>
> > Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts 
ID
> > To: Repeater-Builder@yahoogroups.com
> > Date: Friday, September 19, 2008, 12:48 AM
> > Thanks for the reply/suggestion. A stud mount of greater
> > current 
> > rating may be the way to go. I could just drill out of the
> > existing 
> > mounting holes and use the stud mount and a nut/washer
> > combo. 
> > 
> > However, after googling till my eyes fell asleep, I found a
> > few 
> > sources on the web for the original diode - which turns out
> > to be a 
> > 1N3492R. So that takes care of the diodes - 
> > 
> > Now, on to the caps.  I mistyped last evening, as they are
> > 17500uf 
> > and not 27000uf.  Not as much luck, but I did find one
> > supplier 
> > listing NOS Moto numbered caps on their web site. I
> > requested 
> > pricing. Depending on the price, I will either buy them or
> > retrofit a 
> > newer style cap.  
> > 
> > Eric
> > KE2D
> > 
> > 
> > 
> > --- In Repeater-Builder@yahoogroups.com, Captainlance 
> >  wrote:
> > >
> > > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE
> > "REVERSE" 
> > POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I
> > HAVE USED 
> > THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE
> > CURRENT 
> > THAN THE FACTORY ONES DO.
> > > LANCE N2HBA
> > >   - Original Message - 
> > >   From: kk2ed 
> > >   To: Repeater-Builder@yahoogroups.com 
> > >   Sent: Thursday, September 18, 2008 9:10 AM
> > >   Subject: [Repeater-Builder] Re: Micor TPN1110A power
> > supply parts 
> > ID
> > > 
> > > 
> > >   The diodes CR1 and CR2 are compression-fitted style
> > rectifier 
> > diodes 
> > >   that are pressed into a rectangle stock of aluminum,
> > and the 
> > aluminum 
> > >   is then secured to the chassis via two screws. The
> > diodes have 
> > one 
> > >   solder lug terminal. 
> > > 
> > >   The service manual only lists the Motorola part #;
> > no specs or 
> > >   industry-standard part # is given. Same on the caps.
> > Only spec 
> > given 
> > >   is 27,000 uf @ 20wvdc. 
> > > 
> > >   I did a quick search of Mouser and DigiKey, and was
> > unable to 
> > find 
> > >   any chassis-mount style caps. Anyone find something
> > suitable that 
> > can 
> > >   be re-secured to the ps's chassis via new rivets
> > or screws? I 
> > know I 
> > >   can just solder in any cap that meets electrical
> > specs, but I 
> > would 
> > >   like the caps to be secure and not have the ps
> > become a fire 
> > hazard 
> > >   waiting to happen!
> > > 
> > >   The power supply was still sitting in my truck last
> > night. When I 
> > get 
> > >   a break today I will take it apart further and see
> > if I can find 
> > a 
> > >   part # stamped on the diodes and caps that might
> > indicate what 
> > the 
> > >   real part # is. While I was at the repeater site
> > yesterday I 
> > thought 
> > >   I saw a 1N stamped on the diodes. 
> > > 
> > >   I would have thought that there would have been
> > someone here on 
> > the 
> > >   list that has repaired one of these supplies before,
> > so that is 
> > why I 
> > >   asked. 
> > > 
> > >   Eric
> > >   KE2D
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Eric,

Thanks for checking.  At that price it would get real expensive real 
quick (8 needed)! 

I guess I am going to be doing some retrofitting (see my post a 
moment earlier).



--- In Repeater-Builder@yahoogroups.com, "Eric Lemmon" <[EMAIL PROTECTED]> 
wrote:
>
> Eric,
> 
> I did some research on those capacitors, and found that the 
original part
> number 2383093G20 is NLA.  However, I noticed that part number 
2383093G27 is
> still available, and is described as "CAP ALU 17500 -10 +150 20V".  
It is
> priced on MOL at $ 36.59 each.  I wonder if it is a suitable 
substitute?
> Curiously, I looked at my TPN1106A power supply, and found that it 
has four
> 2383093G21 capacitors labeled 20,000 uF 100 V, even though the 
parts list
> for that unit lists the 17,500 uF capacitor 2383093G20.  The 
2383093G21,
> 20,000 uF capacitors are available from Motorola at $ 50.43 apiece.
> 
> When I looked up the 1-80739B57 diodes, I found them to be NLA, but 
the
> description is "BD EYLTD".  That doesn't make much sense, unless 
the diodes
> were offered only as an assembly.
> 
> 73, Eric Lemmon WB6FLY
> 
> 
> -Original Message-
> From: Repeater-Builder@yahoogroups.com
> [mailto:[EMAIL PROTECTED] On Behalf Of kk2ed
> Sent: Thursday, September 18, 2008 9:49 PM
> To: Repeater-Builder@yahoogroups.com
> Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID
> 
> Thanks for the reply/suggestion. A stud mount of greater current 
> rating may be the way to go. I could just drill out of the existing 
> mounting holes and use the stud mount and a nut/washer combo. 
> 
> However, after googling till my eyes fell asleep, I found a few 
> sources on the web for the original diode - which turns out to be a 
> 1N3492R. So that takes care of the diodes - 
> 
> Now, on to the caps. I mistyped last evening, as they are 17500uf 
> and not 27000uf. Not as much luck, but I did find one supplier 
> listing NOS Moto numbered caps on their web site. I requested 
> pricing. Depending on the price, I will either buy them or retrofit 
a 
> newer style cap. 
> 
> Eric
> KE2D
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[kk2ed]

Which book might that be?



--- In Repeater-Builder@yahoogroups.com, "sgreact47" <[EMAIL PROTECTED]> 
wrote:
>
> I looked in my book and find several caps that will replace the 
17,500
> uF at 20 volts.
> 
> Cornell Dubilier 380LX  22,000 at 35 volts
>  381LX  22,000 at 35 volts
>  DCMC   33,000 at 25 volts 
> 
> United Chem-Con  KMH  33,000 at 35 volts   (my favorite)
> 
> XiconLS223MIV3545   22,000 at 35 volts   
> 
> 
> "Eric Lemmon"  wrote:
> >
> > Eric,
> > I did some research on those capacitors, and found that the 
original
> > part number 2383093G20 is NLA.  However, I noticed that part 
number 
> > 2383093G27 is still available, and is described as "CAP ALU 17500
> -10 > +150 20V".
>

[Repeater-Builder] Re: CTCSS highpass filter paper

[skipp025]

Those of us in the industry will probably still use the well 
known Norcomm or original Selectone Circuits as the most 
practical answer, a well trusted proven circuit and a fair 
dollar value. 

cheers, 
skipp 

> Joe Montierth <[EMAIL PROTECTED]> wrote:
>
> Walter, that same chip could easily be built up on a small circuit
board to give a 2175 notch, with a very sharp response. Could probably
build one up for $20 or so.
> 
> Joe
> 
> --- On Thu, 9/18/08, ka1jfy <[EMAIL PROTECTED]> wrote:
> From: ka1jfy <[EMAIL PROTECTED]>
> Subject: [Repeater-Builder] Re: CTCSS highpass filter paper
> To: Repeater-Builder@yahoogroups.com
> Date: Thursday, September 18, 2008, 3:17 PM
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Not real interested in a PL filter, but my agency [hello
Joe M] would 
> 
> be REAL interested in a commercial version of the notch filter.
> 
> 
> 
> We currently put either a Vega passive [$150] or Midian active [$60]
> 
> 2175 notch in every repeater we build up.
> 
> 
> 
> Walter KD7BJJ
> 
> Phoenix, AZ
> 
> 
> 
> --- In Repeater-Builder@ yahoogroups. com, Kevin Custer  
> 
> wrote:
> 
> >
> 
> > All,
> 
> > 
> 
> > Reference :http://www.mix- sig.com/Msi5data 12.pdf
> 
> > 
> 
> > Repeater Builder (the company) may be interested in building this 
> 
> up and 
> 
> > making it available as a add on unit.  We had looked at this some 
> 
> time 
> 
> > ago, but felt the concept was not understood by our community to 
> 
> the 
> 
> > degree that the product would be very successful.  We have found 
> 
> that 
> 
> > education of the folks interested in the AP-50 has been a challenge 
> 
> at 
> 
> > best.  Sure, better sounding repeaters has resulted since the 
> 
> release of 
> 
> > this little device, but I doubt we'll ever sell enough to make it 
> 
> worth 
> 
> > the effort of getting it all together and making it available to 
> 
> the 
> 
> > general builder.
> 
> > 
> 
> > How many of you would really buy a PL filter like this?
>

[Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[sgreact47]

"kk2ed" <[EMAIL PROTECTED]> wrote:
> Unless I'm forgetting something, more capacitance can't hurt, no?

In this case more capacity is good.

> Which book might that be?

   MOUSER MOUSER 

  33,000 uF is as big as this series has. Two is good, as the newer
capacitor design has much less ESR (equivalent series resistance)and
much higher ripple current capacity. One 33,000 uF cap could replace
three of the old type caps.

Re: [Repeater-Builder] Re: Ge Mastr II Squelch

[no6b]

At 9/19/2008 15:35, you wrote:
>--- In Repeater-Builder@yahoogroups.com, "kb5vjy" <[EMAIL PROTECTED]> wrote:
> >
> > I have just put my second Mastr 2 repeater together and I would like
> > to see if anyone has any input in the squelch circuit.  I noticed on
> > both of them that when users un-key their radios, there is about a
> > half second white noise burst.   I have preformed the M2 Squelch
> > circuit modification by adding a 4.7uf at 35v cap c630 and replacing
> > c631 (the second unit had c631 clipped out)
>
>Hi There,
>
>Bite the bullet and install a Micor Squelch Board, like the RLC-MOT.
>You'll be glad you did.  And no more squelch crashes.

There shouldn't be any squelch tail with the Mastr II squelch configured as 
you indicate.  However I'm a bit confused as C630 shouldn't need to be 
added to a mobile IFAS board - it's standard.

What line are you using for the COS signal?

BTW, the RLC-MOT board is now $110.  At that price it's worth my trouble to 
extract the Micor squelch chip from a mobile audio/squelch board & build my 
own circuit around it.  Still, I find the Mastr II squelch works pretty 
good.  Maybe not quite as good as the Micor, but sometimes not worth the 
effort or expense depending on the application.

Bob NO6B

Re: [Repeater-Builder] Re: Micor TPN1110A power supply parts ID

[Glenn Little WB4UIV]

The capacitance may be split between capacitors to reduce the effects 
of internally generated heat, ESR and inductance.

I would use the same number of capacitors as the engineer that 
designed the supply specified.

I would also use 105 degree C capacitors that have the lowest ESR 
that I could afford and would handle the highest ripple current.


73
Glenn
WB4UIV

At 09:24 PM 9/19/2008, you wrote:
>I think you're probably right.  I found a source for the OEM caps at
>$9 each, but may I'm better off just fabricating some sort of
>mounting mechanism and using newer style caps.
>
>Rather than using 2 17500uf either side of the chokes and four after
>the last choke, could I just use one 40,000uf or so either side, and
>two 40,000 after the last choke?   Unless I'm forgetting something,
>more capacitance can't hurt, no?
>
>
>Eric
>KE2D
>
>
>--- In Repeater-Builder@yahoogroups.com, "Bob M." <[EMAIL PROTECTED]>
>wrote:
> >
> > The problem with buying NOS caps is that they might have been new
>in 1980. They've been sitting on the shelf for all this time, and
>might not be much better than what you have now (unless yours are
>shorted).
> >
> > Bob M.
> > ==
> > --- On Fri, 9/19/08, kk2ed <[EMAIL PROTECTED]> wrote:
> >
> > > From: kk2ed <[EMAIL PROTECTED]>
> > > Subject: [Repeater-Builder] Re: Micor TPN1110A power supply parts
>ID
> > > To: Repeater-Builder@yahoogroups.com
> > > Date: Friday, September 19, 2008, 12:48 AM
> > > Thanks for the reply/suggestion. A stud mount of greater
> > > current
> > > rating may be the way to go. I could just drill out of the
> > > existing
> > > mounting holes and use the stud mount and a nut/washer
> > > combo.
> > >
> > > However, after googling till my eyes fell asleep, I found a
> > > few
> > > sources on the web for the original diode - which turns out
> > > to be a
> > > 1N3492R. So that takes care of the diodes -
> > >
> > > Now, on to the caps.  I mistyped last evening, as they are
> > > 17500uf
> > > and not 27000uf.  Not as much luck, but I did find one
> > > supplier
> > > listing NOS Moto numbered caps on their web site. I
> > > requested
> > > pricing. Depending on the price, I will either buy them or
> > > retrofit a
> > > newer style cap.
> > >
> > > Eric
> > > KE2D
> > >
> > >
> > >
> > > --- In Repeater-Builder@yahoogroups.com, Captainlance
> > >  wrote:
> > > >
> > > > THE DIODES CAN BE REPLACED WITH 1N1191A, THEY ARE
> > > "REVERSE"
> > > POLARITY, AND CAN BE SCREWED DIRECTLY TO THE CHASSIS. I
> > > HAVE USED
> > > THEM MANY TIME WITH GREAT LUCK... AND THEY HANDLE LOTS MORE
> > > CURRENT
> > > THAN THE FACTORY ONES DO.
> > > > LANCE N2HBA
> > > >   - Original Message -
> > > >   From: kk2ed
> > > >   To: Repeater-Builder@yahoogroups.com
> > > >   Sent: Thursday, September 18, 2008 9:10 AM
> > > >   Subject: [Repeater-Builder] Re: Micor TPN1110A power
> > > supply parts
> > > ID
> > > >
> > > >
> > > >   The diodes CR1 and CR2 are compression-fitted style
> > > rectifier
> > > diodes
> > > >   that are pressed into a rectangle stock of aluminum,
> > > and the
> > > aluminum
> > > >   is then secured to the chassis via two screws. The
> > > diodes have
> > > one
> > > >   solder lug terminal.
> > > >
> > > >   The service manual only lists the Motorola part #;
> > > no specs or
> > > >   industry-standard part # is given. Same on the caps.
> > > Only spec
> > > given
> > > >   is 27,000 uf @ 20wvdc.
> > > >
> > > >   I did a quick search of Mouser and DigiKey, and was
> > > unable to
> > > find
> > > >   any chassis-mount style caps. Anyone find something
> > > suitable that
> > > can
> > > >   be re-secured to the ps's chassis via new rivets
> > > or screws? I
> > > know I
> > > >   can just solder in any cap that meets electrical
> > > specs, but I
> > > would
> > > >   like the caps to be secure and not have the ps
> > > become a fire
> > > hazard
> > > >   waiting to happen!
> > > >
> > > >   The power supply was still sitting in my truck last
> > > night. When I
> > > get
> > > >   a break today I will take it apart further and see
> > > if I can find
> > > a
> > > >   part # stamped on the diodes and caps that might
> > > indicate what
> > > the
> > > >   real part # is. While I was at the repeater site
> > > yesterday I
> > > thought
> > > >   I saw a 1N stamped on the diodes.
> > > >
> > > >   I would have thought that there would have been
> > > someone here on
> > > the
> > > >   list that has repaired one of these supplies before,
> > > so that is
> > > why I
> > > >   asked.
> > > >
> > > >   Eric
> > > >   KE2D
> >
>
>
>
>
>
>
>
>Yahoo! Groups Links
>
>
>

Re: [Repeater-Builder] Ge Mastr II Squelch

[Jim Brown]

What signal are you using as the COS from the receiver?  If you use RUS you 
will have a combination of the squelch and the CTCSS detect.  The two are anded 
together so that both have to be present for RUS to be active.

If you are using only the detected CTCSS you will have the hangover you mention 
as it takes a short time for the detected tone to clear out of the filter and 
turn the detect output off.

Typical operation using RUS and a CTCSS decoder is that the RUS signal will 
delay slightly going active as the tone decoder is locking on. Even though the 
CAS has gone instantly to active, this slight delay will be present due to the 
AND gate action.  At the end of a transmission, the RUS will go inactive 
instantly, as soon as the CAS signal goes away, even though a CTCSS signal 
detect is still present.  So RUS gives you the best of both signals, delayed 
keying (only a few tens of milliseconds) and a fast unkey (the squelch mod 
comes into play).

I have several GE Mastr II base station repeaters operating and I have the 
squelch mod described on the Repeater-Builder site installed on all.  They all 
perform as described, with a strong signal giving an instant audio shut-off and 
a weak signal giving a longer squelch burst to reduce the audio switching 
action with a picket fence signal.

I normally use the RUS signal as the CTCSS detect into the controller, and the 
CAS signal as the COS.  If you want to be able to disable the CTCSS 
requirement, this set up works very well.

73 - Jim  W5ZIT

--- On Fri, 9/19/08, kb5vjy <[EMAIL PROTECTED]> wrote:
From: kb5vjy <[EMAIL PROTECTED]>
Subject: [Repeater-Builder] Ge Mastr II Squelch
To: Repeater-Builder@yahoogroups.com
Date: Friday, September 19, 2008, 4:35 PM











Greetings All,



I have just put my second Mastr 2 repeater together and I would like

to see if anyone has any input in the squelch circuit.  I noticed on

both of them that when users un-key their radios, there is about a

half second white noise burst.   I have preformed the M2 Squelch

circuit modification by adding a 4.7uf at 35v cap c630 and replacing

c631 (the second unit had c631 clipped out)  Both of these units were

mobiles now in station cabinets.  Tuned 443.800 and 443.900.



Thanks for the response and 73 de Joe KB5VJY

._,___