Silver faced President Jackson

[sonoma]

here is a controlled carrier mod for the Jackson radio. I have 2 of them and the mod works just fine. will give more modulation on AM and increase the carrier.
some radios will not have the cap across tr36.

if you want to wake this radio up some so it is better on AM there is a easy mod to help it out.
leave the limiter in tack .
remove the 103 capacitor from the legs of TR36
lift one leg of R179
solder a jumper to the cathode of D55, banded end.
solder the other end to the base of TR36 which is the leg closest to the rear of the radio
on mine it will dead key 2 watts on am and swing to 30 watts with a strong audio or whistle.
the radio is a lot louder on am now.
average watts while just normal talking is about 12 watts

 

[sonoma]

for a little more audio you can change 2 resisters
audio inhancement
change R258 to a 1.5K
change R261 to a 3.9K or a 4.7K ,I use a 4.7K

now just check and you will see a improvement of the radios output. peak it and it will come up even more.

 

[Fred Spoon]

If you are looking to find an AM monster in this radio, then I'm afraid that you have struck out.
However, if you were looking THE best SSB radio,; then you hit a grand slam homer.

The AGC mod is a necessary mod for this radio receiver section. It really must be done o it. Read back a few posts on this thread and it is there.

Rob exactly what does the AGC Mod due and where is it located and where can I find out more info on it . Thank you

 

[sonoma]

this info is on page one. it helps the RX of SSB the most. prevents the overloading of the RX.

remove C31 (.47uf )

change R43 (10K) to 1k

change R41 (150K) to 270K

change R47 (1.5K) to 3.9k

for some strange reason the maker got the agc timing wrong from the outset and never bothered to rectify the situation throughout the production life of the jacko,
the above mod from lou franklins book fixes it nicely, i have done plenty for locals over the years, without the mod they are useless for talking to very strong ssb stations locally or in good dx conditions,

 

[jimbo1984]

here is a controlled carrier mod for the Jackson radio. I have 2 of them and the mod works just fine. will give more modulation on AM and increase the carrier.
some radios will not have the cap across tr36.

if you want to wake this radio up some so it is better on AM there is a easy mod to help it out.
leave the limiter in tack .
remove the 103 capacitor from the legs of TR36
lift one leg of R179
solder a jumper to the cathode of D55, banded end.
solder the other end to the base of TR36 which is the leg closest to the rear of the radio
on mine it will dead key 2 watts on am and swing to 30 watts with a strong audio or whistle.
the radio is a lot louder on am now.
average watts while just normal talking is about 12 watts

Hello I tried this mod on my president jackson. The peak am swing was improved. But now everyone says my audio sounds pinched. I also did the mod below for improved audio. Which was changing the value of two resistors . R261 and R258 any ideas why audio now sounds pinched.