Re: Placing Two Identical Regulated DC supplies in Parallel
All good- but seems like it is over complicated when you can get a
single 50 or 60amp supply to do the job probably for less money than
2, 3 or 4 smaller power supplies.
73,
Marlo
KA2IRQ
On 4/20/2025 2:16 PM, JOHN HASERICK
wrote:
toggle quoted message
Show quoted text
Hello
Marlo,
?
If used
for the Henry Amp, it would be 33Amps at 14.1V. I am going to
try just for curiosity, two Astron SS-30M supplies in parallel
and compare with the existing repeater HRP-600 12. First I
will try no equalizing resistors and monitor currents and
voltage as it keys , unkeys, and over different TX times. then
take it from there and let the actual results be known for all
to benefit. It certainly would be great if it can be made to
work with 2 side by side rack mounted units at least for those
particular supplies.
?
One of
the other nearby 6M repeaters uses a different Astron model
switcher with 4 switchers packaged together in parallel by
Astron with each unit drawing on TX between 9 and 9.5A? at
13.8V for a 300W? TE Systems amp. Been working for over 5 yrs,
but I am a bit concerned that it did not have overvoltage
protection. I do not see that model supply still being sold by
Astron. If I remember correctly, the 4 supplies were
interconnected to a common voltage? control bus, and
monitoring of individual supply currents was done one at a
time with a rotary switch. That got me thinking about joining
the SS-30's.
?
John
On 04/20/2025 8:34 AM EDT Marlo Montanaro - KA2IRQ
<ka2irq@...> wrote: ?
?
John,
?
What load are we trying to supply?? How much total
current?
?
--
73,
Marlo
KA2IRQ
?
|
Re: Difficulty Programming a Maxtrac 300, 32 Channel
I've used DOSBOX on XP up to Win11 with
good luck. You must remember to have ALL files in the same file
folder (directory) and follow DOS naming protocols, including
length of the filenames and legal characters. And I'm not real
good at computer stuff, but I did follow their online
instructions.
Chuck
WB2EDV
On 4/20/2025 1:45 PM, Jared Smudde via
groups.io wrote:
toggle quoted message
Show quoted text
I¡¯ve made numerous attempts to use DosBox over the years and
have never had any luck. I¡¯ve got a 486 laptop that I use for
DOS software and before that I used to program them with a 2007
dual core AMD processor running FreeDOS off a USB drive. The
only issue I¡¯ve had with processor speed is the R100 software
and the Radius M10 software.?
|
FS MTR2000 VHF 100 Watt On 2 Meters
Changing out my 2 meter MTR2000 repeater on analog FM for a multi-mode repeater.
Not sure what the market value is, so open to offers for the next few days.
Email me direct at my call sign at gmail.
|
Thank you to Tim, Jeff and Mike for your Reply's.
I have now found the problem to be a smal surface mount fuse neer the control head connector on the main board on the Filtred B+ line feeding the control head.
R0410 , Motorola Part # 0662057B47
With this fuse replaced all the missing feature of the control heads are back working.
ON-OFF Switch, LCD Light's, DTMF Mike Lights, RX-TX led.
Nice Easter Holiday to All.
Carl
VA2CMB
I forgot to say that the 6881091C63 Detailed Service Manual covers low band, high band and UHF...
everything but the narrowband-only "200" and "700" MHz CDMs.?? They have their own manual.
Mike WA6ILQ
?
?
|
Re: Placing Two Identical Regulated DC supplies in Parallel
I've been running 4 Meanwell switchers (12VDC @ 29 amps) in series for well over 10 years to provide 50 volts to my 6 & 2 meter solid state KW amps. They haven't let me down even after hours and hours of 1 minute TX and 1 minute RX)
Ken
------------------------------------------------------------------------------
President and CTO - Arcom Controllers
Makers of repeater controllers and accessories
Phone: (503) 678 6182
Authorized Dealers for Kenwood and Telewave.
We offer complete turn-key repeater packages!
"We don't just make 'em. We use 'em!"
[]
|
Re: Placing Two Identical Regulated DC supplies in Parallel
Hello Marlo,
?
If used for the Henry Amp, it would be 33Amps at 14.1V. I am going to try just for curiosity, two Astron SS-30M supplies in parallel and compare with the existing repeater HRP-600 12. First I will try no equalizing resistors and monitor currents and voltage as it keys , unkeys, and over different TX times. then take it from there and let the actual results be known for all to benefit. It certainly would be great if it can be made to work with 2 side by side rack mounted units at least for those particular supplies.
?
One of the other nearby 6M repeaters uses a different Astron model switcher with 4 switchers packaged together in parallel by Astron with each unit drawing on TX between 9 and 9.5A? at 13.8V for a 300W? TE Systems amp. Been working for over 5 yrs, but I am a bit concerned that it did not have overvoltage protection. I do not see that model supply still being sold by Astron. If I remember correctly, the 4 supplies were interconnected to a common voltage? control bus, and monitoring of individual supply currents was done one at a time with a rotary switch. That got me thinking about joining the SS-30's.
?
John
On 04/20/2025 8:34 AM EDT Marlo Montanaro - KA2IRQ <ka2irq@...> wrote:
?
?
John,
?
What load are we trying to supply?? How much total current?
?
--
73,
Marlo
KA2IRQ
?
|
Re: Difficulty Programming a Maxtrac 300, 32 Channel
I¡¯ve made numerous attempts to use DosBox over the years and have never had any luck. I¡¯ve got a 486 laptop that I use for DOS software and before that I used to program them with a 2007 dual core AMD processor running FreeDOS off a USB drive. The only issue I¡¯ve had with processor speed is the R100 software and the Radius M10 software.?
|
Re: Difficulty Programming a Maxtrac 300, 32 Channel
It's not just slower speed; all the old Motorola DOS RSS expect the serial port to be using a processor in REAL mode (actual DOS, hardware control of the serial port) not PROTECTED mode (serial port controlled by/mapped through Windows).
?
Short of a computer with a real serial port running real DOS, two things you can try:
?
1)? On the HamVOIP website is a link to instructions for setting up a Raspberry Pi to do some sort of emulation that actually works with some of the Motorola DOS programs. I found the service screens (tuning) to be flaky but I was at least able to program a GM300 and a Maxtrac with it, using my Sabrent FTDI serial-USB thingy and a RIB box/cable.
?
2) There's a new fork of DOSBox call DOSBox-X on Github? It claims to have much more granular control of processor speed and serial port control but I have no experience with it yet. It may or may not deal with the fundamental underlying problem.
?
If you just need to get frequencies into a Maxtrac, the thing on HamVOIP is probably your best bet.
|
Re: Difficulty Programming a Maxtrac 300, 32 Channel
Well, tried Com1, Com2 up to Com 36 and all different baud rates for each Com selected with no luck so I asked AI Gemini what was the typical baud rate for programming a maxtrac radio, below is the answer.
?
The initial communication baud rate for programming a Motorola Maxtrac radio is approximately 950 baud.
The Radio Service Software (RSS) and the radio initially communicate at this slower speed. After establishing communication, the software typically sends a message to the radio to switch to a faster baud rate, around 7600 baud, for more efficient data transfer during the programming process.
?
Well, I don't know if that is correct but I have no way to effectuate those baud rates, I guess I'm dead in the water.
?
Bill
K2WH
|
Re: Difficulty Programming a Maxtrac 300, 32 Channel
You could try MoSlo, I¡¯ve used it long ago to slow down PCs programming old radios.
you can get the basic ver for free, or delux for donation to a charity for $25.
Also using a good quality USB to serial adapter such as one from Sealevel
79.00, but you can usualy find used ones on eBay. If not sealevel, be sure to use one with a FTDI chip set. Can be found on Amazon, no name for $12 or Star Tech for $33
?
Greg
AI?B
|
Re: Tuning Rod for Wacom WP-643
I prefer copper on stainless parts, but aluminum is OK too.? The thing to remember is you want to use an anti-size with particles that are NOT the same as either of the surfaces that are in contact.? Heat resistance is the other variable, but not applicable here. ? ? ??????????????????????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A ?
toggle quoted message
Show quoted text
From: [email protected] <[email protected]> On Behalf Of Dan Schroeder via groups.io
Sent: Saturday, April 19, 2025 10:34 PM
To: [email protected]
Subject: Re: [repeater-builder] Tuning Rod for Wacom WP-643? In reference to the Never-Seez recommendation, I have two needs, Invar threaded duplexer tuning rods, and stainless steel on stainless steel nut/bolts for tower leg clamps on towers.? I have used some Permatex Antiseize from NAPA in the past for both. Amazon shows 20 different versions of Never-Seez.? Looking at just versions that come with a brush for applying, I see: 1.? NGBT-8 Silver Gray Nuclear Grade Nickel Special Anti-Seize ? 2.? Never-Seez NSBT-8 Silver Gray Regular Grade Anti-Seize ? 3.? Never-Seez NSBT-8N Silver Pure Nickel Special Anti-Seize ? 4.? Never-Seez NMCBT-8 Black Gray Mariners Choice Anti-Seize ? 5.? Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize ? 6.? Never-Seez 535-30803832 8 oz Mariners Choice Anti-Seize, Black & Gray ? 7.? Never-Seez NSSBT-16 Silver 16 High-Temperature Stainless Anti-Seize Pretty sure I don't need a 2000+ degree material.? But I have no idea what Nuclear, Mariners Choice, Pure Nickel, or Regular, means. Just want to know which of the 7 items above is best and if I need to use a different material for tuning rods vs. stainless on stainless bolts/nuts.
|
Re: Placing Two Identical Regulated DC supplies in Parallel
John,
?
What load are we trying to supply?? How much total current?
?
--
73,
Marlo
KA2IRQ
?
|
Re: Tuning Rod for Wacom WP-643
I would definitely look for a brand name like Loctite,
It's never failed me - I liked the copper base,
too many copy cats these days ready to take your money, Dan.
Tell the man behind the counter what the application is for,
Stainless steel hardware will gall. Kerosene was an old trick.
73 John
toggle quoted message
Show quoted text
On 20/04/2025 12:33 pm, Dan Schroeder via groups.io wrote: In reference to the Never-Seez recommendation, I have two needs, Invar threaded duplexer tuning rods, and stainless steel on stainless steel nut/bolts for tower leg clamps on towers.? I have used some Permatex Antiseize from NAPA in the past for both.
Amazon shows 20 different versions of Never-Seez.? Looking at just versions that come with a brush for applying, I see:
1.NGBT-8 Silver Gray Nuclear Grade Nickel Special Anti-Seize
2.Never-Seez NSBT-8 Silver Gray Regular Grade Anti-Seize
3.Never-Seez NSBT-8N Silver Pure Nickel Special Anti-Seize
4.Never-Seez NMCBT-8 Black Gray Mariners Choice Anti-Seize
5.Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize
6.Never-Seez 535-30803832 8 oz Mariners Choice Anti-Seize, Black & Gray
7.Never-Seez NSSBT-16 Silver 16 High-Temperature Stainless Anti-Seize
***
Pretty sure I don't need a 2000+ degree material.? But I have no idea what Nuclear, Mariners Choice, Pure Nickel, or Regular, means.
Just want to know which of the 7 items above is best and if I need to use a different material for tuning rods vs. stainless on stainless bolts/nuts.
Dan K5FVL
|
Re: Tuning Rod for Wacom WP-643
In reference to the Never-Seez recommendation, I have two needs, Invar threaded duplexer tuning rods, and stainless steel on stainless steel nut/bolts for tower leg clamps on towers.? I have used some Permatex Antiseize from NAPA in the past for both.
?
Amazon shows 20 different versions of Never-Seez.? Looking at just versions that come with a brush for applying, I see:
?
1.? NGBT-8 Silver Gray Nuclear Grade Nickel Special Anti-Seize
?
2.? Never-Seez NSBT-8 Silver Gray Regular Grade Anti-Seize
?
3.? Never-Seez NSBT-8N Silver Pure Nickel Special Anti-Seize
?
4.? Never-Seez NMCBT-8 Black Gray Mariners Choice Anti-Seize
?
5.? Never-Seez NSBT-16N Silver Pure Nickel Special Anti-Seize
?
6.? Never-Seez 535-30803832 8 oz Mariners Choice Anti-Seize, Black & Gray
?
7.? Never-Seez NSSBT-16 Silver 16 High-Temperature Stainless Anti-Seize
***
Pretty sure I don't need a 2000+ degree material.? But I have no idea what Nuclear, Mariners Choice, Pure Nickel, or Regular, means.
Just want to know which of the 7 items above is best and if I need to use a different material for tuning rods vs. stainless on stainless bolts/nuts.
?
Dan K5FVL
|
Re: In search of dB4060 -005 coupling loops or assemblies
I had access to machines like that before I retired about 11 years ago.? Really hated to give up access to a fully equipped machine shop and scrap aluminum and stainless steel. If I could not make it someone that actually worked in that area could.
Ralph ku4pt
On Saturday, April 19, 2025 at 08:54:21 PM EDT, John via groups.io <gielisj@...> wrote:
I had my money ready to buy this tool a few years ago. BAUMR-AG 200mm Sheet Metal Shear & Brake Combination Manual Bending Guillotine 73 John
|
Re: Tuning Rod for Wacom WP-643
Thanks Jeff... that sounds like really good advice.
Mike
WM4B
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] < [email protected]> On Behalf Of Jeff DePolo WN3A via groups.io Sent: Saturday, April 19, 2025 9:42 PM To: [email protected]Subject: Re: [repeater-builder] Tuning Rod for Wacom WP-643 I did, but then decided that discretion was the better part of valor and resisted the temptation.
I did put some lateral pressure on it and it just didn¡¯t feel right; probably because it¡¯s Invar.
If I ever get it back in the shop again, I¡¯ll give it a try. I've bent them back when I've had no other choice and, probably 8 times out of 10, was successful. I'd suggest that after you bend it back into what seems to be right that you run the rod out (not in) and put some Never-Seez on the threads in the area where it had been bent just in case it starts to bind on the way back in; you'll have a better chance of backing it out for further tweaking without it galling up. --- Jeff WN3A
|
Re: Tuning Rod for Wacom WP-643
I did, but then decided that discretion was the better part of valor and resisted the temptation.
I did put some lateral pressure on it and it just didn¡¯t feel right; probably because it¡¯s Invar.
If I ever get it back in the shop again, I¡¯ll give it a try. I've bent them back when I've had no other choice and, probably 8 times out of 10, was successful. I'd suggest that after you bend it back into what seems to be right that you run the rod out (not in) and put some Never-Seez on the threads in the area where it had been bent just in case it starts to bind on the way back in; you'll have a better chance of backing it out for further tweaking without it galling up. --- Jeff WN3A
|
Re: In search of dB4060 -005 coupling loops or assemblies
- And possibly building a die set to make multiple sets.? The copper is standard grounding strap
- which I have a supply of.? Needing to figure out shearing the strips to the correct width.?
? The stock for the loops is ?¡± wide, 32 mils thick (20 gauge).? I prefer using 40 mil (18 gauge), it holds its shape better.? The loops are simple to form using hand tools.? Suggest using a 1/8¡± Whitney punch for the holes; drilling such thin/narrow stock often results in a lot of four-letter words being uttered. ? ??????????????????????????????????????????????????????????????????????????????????????????????? --- Jeff WN3A
|
Re: DB4060 Series Dfor a 4-cuplexer Cans
Jeff DePolo,
Right on Jeff. Screw size you supplied is correct. Happy to find that I have a "B" range DB 4062!
Also a big thanks to Jeff and others who have assisted me with my questions.
Happy Easter.
Tim
AE7TH
toggle quoted message
Show quoted text
On 04/19/2025 5:44 PM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote:
I checked the loops on my 4062 cavities to verify the range of the duplexer.
The HIGH pass cavities used loop "005", LOW pass used loop "004"
Am I correct to assume this duplexer is a "B" range? Yep, you're good with those loops.
I'm pretty sure the screws are #6-32 x 1/4", stainless. I can measure one if you can't verify.
--- Jeff WN3A
|
Re: In search of dB4060 -005 coupling loops or assemblies
I had my money ready to buy this tool a few years ago.
BAUMR-AG 200mm Sheet Metal Shear & Brake Combination Manual Bending Guillotine
73 John
toggle quoted message
Show quoted text
On 20/04/2025 2:12 am, Keith via groups.io wrote: I have a set of those too.? Same issue.? I was able to procure the engineering drawings for the loops and I am looking at making a set for myself. And possibly building a die set to make multiple sets.? The copper is standard grounding strap which I have a supply of.? Needing to figure out shearing the strips to the correct width.? If I can figure that out I may move forward with making a couple dozen sets up.? More to follow
|
Marlo Montanaro - KA2IRQ
Carl Beaudry
Ken Arck AH6LE
Jared Smudde
Bill
Mike Besemer - WM4B