-
You can now help support WorldwideDX when you shop on Amazon at no additional cost to you! Simply follow this Shop on Amazon link first and a portion of any purchase is sent to WorldwideDX to help with site costs.
-
Retevis is giving away Radios for the New Year and Every Member is Eligible. Click Here to see the details!
5/10 turn pot cobra 142 gtl
- Thread starter KD2GOE
- Start date
Maybe Tim @ SR Customs can steer you or if ya catch him when he isnt crabby he could sell you one. Ive seen one of his recent vids and he blurrted out where he gets those 10 turn pots. Gotta listen to him carefully cause he sometimes says his suppliers.
Is he crabby because he is watching over his shoulder with the feds busting all the cb mod guys?
you can get them from Mouser electronics, and im sure others carry them too.
mouser does not have a minimum order, thats why i chose to link to them:
534-11203 Vishay / Spectrol | Mouser
this is the one you want.
you will find that you will have to carefully drill out the inside of the knob just a little bit.
you should use a 1/4" drill bit.
here is the technique i use.
use a drill press, and drill a hole in a block of wood that will allow the knob to be placed in it, hole side up.
the knobs are usually tapered, so its easy to just push it in and it will stay put.
make sure you get it lined up right, as you dont want to drill off angle.
set the stop on your drill press so that you cant come through the other side of the knob, and slowly bore out the hole to exactly 1/4".
if done right, the knob should push right on to the shaft of the 10 turn pot with a nice and snug fit.
you should also be able to pull it off later without damaging the pot.
yes, you can just use a hand drill, but after a few knobs that look "wonky" when you turn the clarifier, you will want to do it right.
i understand if you just got frustrated and restored the radio to stock, but an unlocked clarifier is very helpful when trying to talk to more than one person on a channel.
good luck,
LC
mouser does not have a minimum order, thats why i chose to link to them:
534-11203 Vishay / Spectrol | Mouser
this is the one you want.
you will find that you will have to carefully drill out the inside of the knob just a little bit.
you should use a 1/4" drill bit.
here is the technique i use.
use a drill press, and drill a hole in a block of wood that will allow the knob to be placed in it, hole side up.
the knobs are usually tapered, so its easy to just push it in and it will stay put.
make sure you get it lined up right, as you dont want to drill off angle.
set the stop on your drill press so that you cant come through the other side of the knob, and slowly bore out the hole to exactly 1/4".
if done right, the knob should push right on to the shaft of the 10 turn pot with a nice and snug fit.
you should also be able to pull it off later without damaging the pot.
yes, you can just use a hand drill, but after a few knobs that look "wonky" when you turn the clarifier, you will want to do it right.
i understand if you just got frustrated and restored the radio to stock, but an unlocked clarifier is very helpful when trying to talk to more than one person on a channel.
good luck,
LC
First off, unless the radio's clarifier is unlocked AND it can slide 10-20kc's; then there is no point to put in a 5-10-turn clarifier pot. The basic open clarifier mod does not slide more than 1.5kc's and the stock pot is just fine with that.
If you REVERSE the open clarifier mod; then it will be necessary to RETUNE the radio loop oscillator. So, I would not do that unless you are prepared to have that done too.
If you REVERSE the open clarifier mod; then it will be necessary to RETUNE the radio loop oscillator. So, I would not do that unless you are prepared to have that done too.
Last edited:
the extra channels wont change what freqs you set the VCO offesets and IF cans to, but it does change where your "center" freq is, and that means that when balancing the RX and TX sections for even spread across the band, you might use a freq higher than 40 or lower than 1.
it depends on what your specific coverage is.
on the clarifier mod, the way they did it is kinda dumb.
remove the orange wire from those resistors and such and put it on pin 1 of the MB3756 voltage reg.
remove the red wire from PC board ground and insert a 3.3k resistor in series with it.
you will have to re-align the VCO offsets, but this should tame down the slide a bit.
LC
it depends on what your specific coverage is.
on the clarifier mod, the way they did it is kinda dumb.
remove the orange wire from those resistors and such and put it on pin 1 of the MB3756 voltage reg.
remove the red wire from PC board ground and insert a 3.3k resistor in series with it.
you will have to re-align the VCO offsets, but this should tame down the slide a bit.
LC
that is 100% what I was thinking LOL
tapping off the 13.8V rail is not smart as it is not regulated as good as tapping off the MB3756 voltage reg.. if the voltage where to drift it would make the clarifier drift.... am I right?
glad to help.
yes, if the voltage fluctuates, so will your frequency.
usually a 1k resistor will drop 13.8 volts down to around 8 volts.
if those resistors (remember they are in parallel) equal less than 1K, then they were trying to feed too much voltage to the clarifier in order to get more slide.
a true cheap and dirty trick.
you will still love the 10 turn pot.
makes any radio more stable on SSB.
LC
yes, if the voltage fluctuates, so will your frequency.
usually a 1k resistor will drop 13.8 volts down to around 8 volts.
if those resistors (remember they are in parallel) equal less than 1K, then they were trying to feed too much voltage to the clarifier in order to get more slide.
a true cheap and dirty trick.
you will still love the 10 turn pot.
makes any radio more stable on SSB.
LC
Last edited:
- No one is chatting at the moment.
