Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12, 2025) x

Thread Closed

*COMPLETED* simple S meter? for a minerva tropic master
#2

another idea was suggested and i tried it last night.

i put my cheapy 10$ analog meter in series within the area shown on the schematic.
the only odd thing is this particular conductor is a part of the solid #8awg tinned copper **HOT** buss bar system that runs bare everywhere under the set.  

i cut the buss bar just ahead of the TEE in the photo and put my ammeter there.

I am not really sure about this yet but i think it will be a good option.

with my ammeter in place, i power up and all is well.
the ammeter has 10ma, 250ma , 10ua and 50ua scales only.
i tried using the 10ma scale and the needle pegs out... no matter what.
using the 250ma scale with radio on, the needle creeps up to around 35ma.
when i tune to a station and it comes in with strength, the needle reading drops proportionally to somewhere around 20ma.

when i use the speaker terminals with my millivolt meter, the needle is around 20mv with no signal and it proportinally increases with voltage.

in order to use a milliamp meter, i need a scale like 50ma i think.
what it will look like installed is this...
-radio off , needle to the left...
radio on,,, needle to around 75% to 80% to the right.
As a station comes in really good, the "GOOD" indication is when the needle moves to the left!!  kinda backwards from a man/machine visual indication but it is what it is.  all i have to do is redo a background label showing such info.


Attached Files Image(s)
       





Users browsing this thread: 1 Guest(s)
[-]
Recent Posts
54C Complete Teardown/Rebuild
Hello Roy, here is this one sincerely Richardradiorich — 12:45 AM
54C Complete Teardown/Rebuild
Richard, Had grabbed it already but thank you just the same.  I find myself wanting to find some way to block out the...glyphmon — 12:03 AM
54C Complete Teardown/Rebuild
Hello roy, here is a link to the schematic . Sincerely Richardradiorich — 11:54 PM
54C Complete Teardown/Rebuild
Richard, The Silvertone 2014 also is a transformerless set, so I am incorporating a 1:1 600 ohm audio isolation transfo...glyphmon — 11:37 PM
Preliminary work on wife's Silvertone 2014
Did an alignment today which was interesting.  IF alignment went great, almost all was already spot-on.  Adjusting on th...glyphmon — 11:35 PM
54C Complete Teardown/Rebuild
The main problem with adding a Bluetooth input is that this set lacks a traditional power transformer to isolate it from...radiorich — 11:19 PM
54C Cabinet Refinish
I started stripping this cabinet before it got super chilly out because I knew I wasn't going to be able to work on ...glyphmon — 11:18 PM
54C Complete Teardown/Rebuild
While I'm waiting to wrap up the final steps on my wife's Silvertone 2014, I started disassembly on the next project.  O...glyphmon — 11:07 PM
Preliminary work on wife's Silvertone 2014
Hello roy, that great news glad it worked out for you !! Sincerely Richardradiorich — 10:50 PM
Preliminary work on wife's Silvertone 2014
Safety caps arrived today.  Soldered one in and had a successful first power-up.  No magic smoke escaped and it tunes in...glyphmon — 09:53 PM

[-]
Who's Online
There are currently no members online.

>