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Author Topic: sight not very good  (Read 974 times)
KC6VMA
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Posts: 56




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« on: April 18, 2008, 03:41:45 PM »

Hello every, does anyone know of a very large stand alone S-meter that is enclosed or just a 3x5" meter that I can have put in some kind of enclosure and mounted on the wall in front of me?

     Thanks Zeke (kc6vma)
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KL0S
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Posts: 132




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« Reply #1 on: April 18, 2008, 03:56:03 PM »

Zeke - the "Workman" brand might be what you're looking for.  See:

http://www.palcoelectronics.com/p1003003.aspx

73 -- Dino KL0S/4
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K0BG
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« Reply #2 on: April 18, 2008, 03:58:59 PM »

My question is, what radio do you have?

Alan, KØBG
www.k0bg.com
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AC5UP
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Posts: 3825




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« Reply #3 on: April 18, 2008, 04:30:44 PM »

For Your Consideration:

Regardless of the physical size of a meter movement the reading still comes down to a needle. You may not need to read the scale as the angle tells the tale, but the needle is still going to be narrow.

National Semi sells 10 segment bar graph / moving dot LED driver chips like the LM3914, LM3915 and LM3916 which can be cascaded if you want 20 or 30 steps of resolution and drive an LED directly. If a person wanted clusters or strings of parallel LED's per segment the chip can drive a medium signal transistor adequate to sink the load at 20-30 mils per LED. Buy enough Green, Yellow and Red LED's and the display could be big enough to read across the street by size & color... Straight line bar, moving dot, circle or even a fan display.

Be the first kid on your block to have a Fan S-Meter.

The LM3914 is 10 step linear:

http://www.national.com/mpf/LM/LM3914.html

The LM3915 is 10 step logarithmic @ 3 dB per step:

http://www.national.com/mpf/LM/LM3915.html

The LM3916 is an electronic VU meter for audio applications:

http://www.national.com/mpf/LM/LM3916.html

Note the 8 and 16 LED low power versions mentioned on each spec sheet. Could be a plan............. Wink
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KC6VMA
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Posts: 56




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« Reply #4 on: April 18, 2008, 06:56:54 PM »

Hi Alan, the rigs or Icom 765 and Kenwood TS-530S.
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KC6VMA
Member

Posts: 56




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« Reply #5 on: April 18, 2008, 07:00:51 PM »

I do not have a problem seeing the needle move, it's telling what it moves too.  Besides I like the needle compared to the bargraph.
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KG4RUL
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« Reply #6 on: April 18, 2008, 09:27:35 PM »

Since you didn't specify HF or VHF/UHF, here are two possibilities:

MFJ-868 - Worlds largest HF SWR/Wattmeter measures a giant 6½ inches diagonally across meter scale

AND

MFJ-867 - Worlds largest VHF/UHF SWR/Wattmeter measures a giant 6½ inches diagonally across meter scale
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K7KBN
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Posts: 2766




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« Reply #7 on: April 18, 2008, 10:09:58 PM »

He's not talking about SWR or Power meters.  He's concerned with S-Meters.
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73
Pat K7KBN
CWO4 USNR Ret.
KC6VMA
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Posts: 56




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« Reply #8 on: April 18, 2008, 10:11:40 PM »

No no no, I do not need a watt meter or swr meter, I am looking for a S-meter (signal strength meter)for receiving signals and giving signal reports.
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KG4RUL
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« Reply #9 on: April 18, 2008, 10:12:12 PM »

Yo, my bad!  Late hour and I had brain flatulence.
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KC6VMA
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Posts: 56




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« Reply #10 on: April 18, 2008, 10:47:57 PM »

It's cool, I had a couple brain farts myself when I realized how for I was from being 30 or 40 anymore.  Thanks and take care.

     Zeke
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N4CR
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Posts: 1655




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« Reply #11 on: April 19, 2008, 12:49:22 AM »

You can unhook the wires from the internal S meter and hook it to an external meter. All the two meters need to have in common is they need to have the same milliamps to reach full scale.

Some experimentation would reveal how many milliamps it takes to pin your meter. You could unhook one lead from it and put any meter that reads in milliamps in series. You would soon know the meter movement's requirements.

Once you have that information, any large meter that has the same movement specifications will work fine. Since the S meter function is tied to the AGC voltage in the radio, it will very likely be specific for each radio.

All you need to do then is put a scale on the new meter.

If you have the desire to do a little extra, you could put a 1/8" jack in that would transfer the current from the inside meter to the outside meter when you put the plug in. That would make it so you would not have to undo any wiring mods to get the radio back to normal operation.
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73 de N4CR, Phil

We are Coulomb of Borg. Resistance is futile. Voltage, on the other hand, has potential.
KC6VMA
Member

Posts: 56




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« Reply #12 on: April 19, 2008, 06:08:25 AM »

Thanks Phil, now this is something I can work with, don't get me wrong, everyone gave me good suggestions and I thank you all.

     Zeke
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AA8LL
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Posts: 400




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« Reply #13 on: April 19, 2008, 07:07:14 AM »

Everybody is 59 or 599 here.  Please, your call again?

73,
Wade
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KG4RUL
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« Reply #14 on: April 19, 2008, 01:35:50 PM »

I have started using the RSQ system for digital signal reports.

RSQ REPORTING
               
READABILITY
R5 95%+   Perfectly readable
R4 80%       Practically no difficulty, occasional missed characters
R3 40%       Considerable difficulty, many missed characters
R2 20%       Occasional words distinguishable
R1  0%       Undecipherable
         
STRENGTH
S9           Very Strong trace
S7           Strong trace
S5          Moderate trace
S3          Weak trace
S1           Barely perceptible trace
         
QUALITY
Q9           Clean signal - no visible unwanted sidebar pairs
Q7           One barely visible pair
Q5           One easily visible pair
Q3           Multiple visible pairs
Q1           Splatter over much of the spectrum

http://www.psb-info.net
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