Realistic TRC 495 tune up info. TRC495

[loosecannon]

Here we are again.

another Realistic chassis with no schematic or service info. to be found.

yes, we can find the modulation pot and the tuning coils for the driver and final, but thats about it.

so, in order to help those who may come across one of these units and want to give it a more thorough going over; here is a more or less complete tune up for this base station.

i cant really call it an "alignment procedure" because there are no test points/ specs. to use, so i'll just call it a "full tune up".


1. attach freq counter to antenna jack. channel 20. TX mode.
adjust CT1 for 27.20500mhz.

2. attach signal generator to antenna jack, and set for about S-2 on radio's meter.
adjust L1, L2, L12, L3, and L13 for max. S units.
check channels 1 and 40 for even receive gain. use L2 to balance.

3. attach wattmeter with dummy load to antenna jack.
adjust L5, L6, and L14 for max modulated wattage.

here are the VR's and what they do:

VR3 S-meter
VR4 Voltage Regulator (set for 13.8 volts on pin 5 of TDA2003 audio chip)
VR5 RF meter
VR7 AMC
VR8 Squelch

well thats about it.
pretty basic little unit, and dont expect too much in the way of "swing".

hope this helps someone someday,
LC

 

[TruckerKevin]

I own one of these. Even though this topic is as old as hell, you sowed some seed here

 

[kopcicle]

Good deal, 6,694 views and someone finally says thank you.

 

[Shane smith]

Good deal, 6,694 views and someone finally says thank you.

Three years later and you get another like....... I found one of these radios a few days ago so your information is appreciated.

 

[CrAcKeR1710]

Thanx bro!!!
I just bought one of these bad boys today and can't wait for it to arrive!!! It is a birthday present for myself and time to sell my other AM Only CB's... LOL!

I have attached a PDF of the TRC-495 Owners Manual.

CrAcKeR 1710 - Chan 19 Colorado Springs, CO

 

[Albie Mark]

its 2021, and yeah, appreciate this info, I have hope for this rig and is on a roadmap for a DDS VFO upgrade!

THANK YOU VERY MUCH LOOSE CANNON, more power to you!

 

[kingsfunnyfarm]

I've have one of these I love it has a stinger board and connex echo in it and this fancy little multi color flashing meter light. wouldn't trade it for anything. Bubba 789 outa lex, ky

 

[guitar_199]

Thanks indeed. I just scarfed this into a text file and saved it!