Re: Johnson Viking Valiant 2 - voltages
I hate those!!! I hope you stumble across what's wrong. There's an EF Johnson mailing list. It isn't very active, much like this list, but it's another place to see if you can get help. More information here: Click on directory of lists and find the one for Johnson, and fill in your information. Donald KX8K On Wed, 08 Mar 2023 14:24:07 -0800, "Iowa59 Ham" <iowa59ham@...> wrote: So Im on a hunting expedition. ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Re: Johnson Viking Valiant 2 - voltages
Thanks Don.
Yeah I have a Craftsman dmm and a new Astro AI.? I elected to cut out and measure the shunt and it tested good then using clip leads I inserted a 5ohm resister but got the same results.
Then just out of curiosity I placed the Dim bulb tester in line and brought the unit up on LV and I have the 200 V light bulb on when the variac hits 20 volts. So something is shorting to chassis is my guess. I removed the tubes but no change. The T1 thru T4 transformers ohm out close to spec so no reason to suspect those are causing the issues.
So Im on a hunting expedition.
73
Patrick/ W0KKM
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Re: Johnson Viking Valiant 2 - voltages
Name/Callsign? see below . . . On Thu, 23 Feb 2023 11:37:29 -0800, "Iowa59 Ham" <iowa59ham@...> wrote: I have a lot of chaos with the voltages on this unit and one item I am stumped on is the R57 shunt > picture + schematic attached.
Why would the voltage be the same on both sides? Unless then repealed Ohms law I should have a lower voltage on one end?
Its a 5.1 Ohm that measures about 6.1 and I get 3mV across it power on. DC Voltage is -67 on both sides with T2 or T1&T2 on. What type of meter are you using? If it doesn't have a high input impedance, it might be loading the circuit slightly on the other end of the resistor. The older Radio Shack meters had a low input impedance compared to most of today's or the old vacuum tube meters. Or you might not be noticing a decimal value difference on a reading. If you measure a voltage drop across it, then a meter should see that difference between the two measurement points to ground, also. One reading should be either -66.007 or -67.003 volts, but I wonder if your meter will let you see such small differences. (Unless you mean -67 mV.) The 3 mV difference means that current is flowing and the resistor isn't shorted somehow internally. What's the current you measure? Does it agree with the 3 mV drop and resistor value you measure with one leg disconnected? That's where I'd start. Donald KX8K ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Johnson Viking Valiant 2 - voltages
Hi all.
I'm working on getting this JV2 back to factory. Not a restoration just functioning. And I'm a rookie so its quite the learning curve.
I have a lot of chaos with the voltages on this unit and one item I am stumped on is the R57 shunt > picture + schematic attached.
Why would the voltage be the same on both sides? Unless then repealed Ohms law I should have a lower voltage on one end?
Its a 5.1 Ohm that measures about 6.1 and I get 3mV across it power on. DC Voltage is -67? on both sides with T2 or T1&T2 on.
What am I missing? Can I replace it with a 5 Ohm 2 Watt and be fine ?
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I could never figure out how to move things into the Ham Band. Nothing like what was done in with the
8600 series, plus I couldn't find an expert on the Micro processor like I did for the 8600.
With that said, I did start on a Aux Micro Processor that would convert the PLL data on the fly as others
have done. I lost interest and also realized tapping into the the board to make the required connections,
wouldn't be worth the work.
The service manual was available on the net and had a schematic of the programming cable. It had 2 parts:
One was the normal TTL RXD & TXD, so I made a simple Dongle to convert my Homebrew KW cable to the 96xx
series Mic. The second part created +12 and maybe some other pins to flash the firmware.
-73, Pete N2MCI
On 2/21/2023 9:33 AM, B wrote:
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The original Viking series predates the 5300. Externally they look
identical, but internally they are completely different. As far as
I know they are primarily analog LTR trunking with some
conventional channel capability. They are not P25 capable.?
These radios use LTR RSS that is DOS based, and the programming
cable is a different pin out. I've never found a schematic for the
cable, but the former RFGuys cable makers used to sell a Viking
cable for the old model Viking.?
These 900 MHz radios would not be related to the 900 MHz 5100s
that flooded the market 10 years ago from Texas that were later
modified for P25 use.
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The original Viking series predates the 5300. Externally they look identical, but internally they are completely different. As far as I know they are primarily analog LTR trunking with some conventional channel capability. They are not P25 capable.?
These radios use LTR RSS that is DOS based, and the programming cable is a different pin out. I've never found a schematic for the cable, but the former RFGuys cable makers used to sell a Viking cable for the old model Viking.?
These 900 MHz radios would not be related to the 900 MHz 5100s that flooded the market 10 years ago from Texas that were later modified for P25 use.
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Greetings from Utah...
I have several EFJ portables, 242-5597, that I use in the ham 900MHz band and I found this mobile that looks a lot like a 5300 ... but no joy programming it.? I have searched all over for any info and have come up dry.? It's labeled as a Viking, powers on, has the same power and accessory connectors as a VHF 5300 mobile.? I have tried every version of pcconfig that I have and no joy at all.? It powers up and transmits and the FCC data shows it as an 18-watt 900 MHz commercial radio.? Based on the reliability and stability of the Ascend portables, I was hoping this one would work.??
Anyone have any thoughts, advice, or pointers I can try?
Thanks in advance.
Jerry, W7SAR
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On Thu, Feb 2, 2023, 6:24 PM Donald Hellen < donhellen@...> wrote: Rick . . .
On Thu, 2 Feb 2023 01:27:19 -0600, "Rick Vantrease" <rickvantrease@...>
wrote:
>1yr 3mo new 59yr old ham seeking info on p25 vhf and uhf rigs.
Have you contacted EF Johnson? It looks like the P-25 is in production.
As for the various modes used by your local clubs, I can't help there. In our
area of the country, we only have 4 basic systems: FM, D-Star, Yaesu Fusion, and
DMR. We also have PL tones to work with which keep random radio signals from
opening the repeater squelch. Nothing encrypted or trunked.
I would suggest you contact a local club and ask those other questions about
trunking, etc.
Donald KX8K
----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM? ?/g/Ham-Antennas
/g/HamRadioHelp? ? /g/Baofeng
/g/CHIRP?
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Rick,
Unless something changed in the rules that I don't know about, which is possible, encryption on ham radios is illegal.
As to why different schemes, it may depend on what radios are popular in a given area.
Why trunking I have no idea.
Dave Springer, N0TXJ
Get
1yr 3mo new 59yr old ham seeking info on p25 vhf and uhf rigs. Cost associated with rigs and software packages. Of the Ham clubs associated near me one uses uhf encrypted one uses vhf and one uses vhf trunked. Why do they all use different rig setups? Where they can control who's in and who's out?
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Rick . . . On Thu, 2 Feb 2023 01:27:19 -0600, "Rick Vantrease" <rickvantrease@...> wrote: 1yr 3mo new 59yr old ham seeking info on p25 vhf and uhf rigs. Have you contacted EF Johnson? It looks like the P-25 is in production. As for the various modes used by your local clubs, I can't help there. In our area of the country, we only have 4 basic systems: FM, D-Star, Yaesu Fusion, and DMR. We also have PL tones to work with which keep random radio signals from opening the repeater squelch. Nothing encrypted or trunked. I would suggest you contact a local club and ask those other questions about trunking, etc. Donald KX8K ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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1yr 3mo new 59yr old ham seeking info on p25 vhf and uhf rigs. Cost associated with rigs and software packages. Of the Ham clubs associated near me one uses uhf encrypted one uses vhf and one uses vhf trunked. Why do they all use different rig setups? Where they can control who's in and who's out?
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On Tue, Jan 24, 2023 at 06:27 PM, jeffbauman wrote:
Sure it's worth it??
?
Good luck if you go forward with it!
?
73,
Jeff
W8KZW
TBD! ? -- 73 de Steve, K9NUD
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Sure it's worth it??
Good luck if you go forward with it!
73, Jeff W8KZW
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May the luck of all the 'ancients' who have soldered in the past,
be with you.
Steve, NR4M
On 1/24/2023 3:38 PM, Steve - K9NUD
wrote:
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Just a quick note to say hello to the group. I just purchased a
$50 Viking 1 and am planning to completely disassemble and
reassemble it. The poor thing is a bit bent up from previous
shipping mishaps. I have gathered the needed tubes and plan to
start a reverse assembly using the kit instructions. It has a few
mods that I want to remove, rather than trying to figure them out.
It was originally kit-built and already has modern caps. I will
measure and likely swap out the resistors. I have not tested the
iron but will do so at the outset. I understand the modulation
transformer is a point of failure due to acid in the paper, so I
will be sure to test continuity there as well. The front panel was
bent but is mostly straight after a bit of effort. The aluminum
frame is bowed from the weight of the transformers. At least one
tube socket has corrosion. But I will get to experience what a
1950's ham went through in getting this thing built and on the
air. Advice is encouraged. Wish me luck!
--
73 de Steve, K9NUD
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Re: building an external power supply for VFO 122.. well actually just restoring existing power supply
This might be a propitious time to overhaul your VFO-122... Replace all the resistors and caps (except the Tempco unit), and those pesky 1% silver mica's ( 2 ea 500pf & 1000pf 1% silver mica). replace the 43pf coupling cap with a modern 43pf NPO ceramic cap.
?Rebuild coax output and power cable assemblies, ?lubricate the rotating jiggly bits, improve the RF grounds.
? Also a good time to replace that horrible gas tube? +150V regulator & dropping resistor with a solid state Zener regulator assembly. IMO
?
Thank You
Kiss-Electronics
Ms Ashley Hall
183 N 5th PL.
Cornelius, Oregon
97113
?
?
W7DUZ
?
?
On Tuesday, January 24, 2023 at 10:15:55 AM PST, Steve <k9nud@...> wrote:
This is on my to-do list. I have seen modern transformers at Mouser that'll provide both voltages. I have a VF-1 that would benefit from the power supply. It seems to work from my Drake 2-NT, and I will need it for my Viking 1.
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73 de Steve, K9NUD
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Just a quick note to say hello to the group. I just purchased a $50 Viking 1 and am planning to completely disassemble and reassemble it. The poor thing is a bit bent up from previous shipping mishaps. I have gathered the needed tubes and plan to start a reverse assembly using the kit instructions. It has a few mods that I want to remove, rather than trying to figure them out. It was originally kit-built and already has modern caps. I will measure and likely swap out the resistors. I have not tested the iron but will do so at the outset. I understand the modulation transformer is a point of failure due to acid in the paper, so I will be sure to test continuity there as well. The front panel was bent but is mostly straight after a bit of effort. The aluminum frame is bowed from the weight of the transformers. At least one tube socket has corrosion. But I will get to experience what a 1950's ham went through in getting this thing built and on the air. Advice is encouraged. Wish me luck!
--
73 de Steve, K9NUD
|
Re: building an external power supply for VFO 122.. well actually just restoring existing power supply
This is on my to-do list. I have seen modern transformers at Mouser that'll provide both voltages. I have a VF-1 that would benefit from the power supply. It seems to work from my Drake 2-NT, and I will need it for my Viking 1.
--
73 de Steve, K9NUD
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In the search for a Courier amp
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Still in the hunt for the Johnson Courier amp. Fine if it needs work, but front panel must be clean and unmolested. What say you? Marc-k7wxk
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By? Marc-K7WXK
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Transplant Touch Tone Pad EF Johnson 5100 ES portable Model 3 ---> Model 2
Hello All,
Has anyone transplanted a TT pad from an ES5100 model 3 to an ES5100 Model 2?
I know that to work in the Model 2 the TT pad must be enabled in the options / firmware.
Not able to find any ES5100 model 3's in VHF and there seems to be an abundance of ES5100 model 3's around in the 700 / 800 MHz flavor.
OR
Would it be easier to remove the 700 / 800 MHz boards from the model 3 and install the VHF boards?
Thanks
Charlie
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Re: WTB Johnson Signal Sentry
You might also try the Johnson list at the mailman.qth mailing list. It will get more eyes on your request. Neither group is very active but they're not dead, either. Donald KX8K On Sat, 17 Dec 2022 10:22:05 -0800, "Larry Tusoni W6YH" <larry@...> wrote: I am looking for a working Johnson Signal Sentry
Please email me directly ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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Rick Vantrease
Steve - K9NUD
Marc-K7WXK