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Nighthawk
New member
Username: Nighthawk

Post Number: 8
Registered: 5-2002
Posted on Thursday, April 29, 2004 - 6:48 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I have a Montgomery Ward Model 719 AM, Upper and Lower SSB radio. It keys 1 watt and swings 1 1/2 watts. 70% Modulation.(On AM). The bottom of the board has PC5833AA and the top of the board cites Uniden. What do I need to do to "open" this radio up? This radio has good ears and in really good condition. Please help..
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Tech808
Moderator
Username: Tech808

Post Number: 2255
Registered: 8-2002


Posted on Thursday, April 29, 2004 - 8:08 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Nighthawk,

MODULATION: CUT ~ R104
AM POWER: ADJUST ~ VR6
SSB POWER: ADJUST ~ VR7

Hope this help's.

Lon
Tech808
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Kc0gxz
Advanced Member
Username: Kc0gxz

Post Number: 780
Registered: 3-2003
Posted on Friday, April 30, 2004 - 12:29 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Nighthawk

And if you end up with the same results, try replacing the finals and see if your RF power returns.

Jeff, kc0gxz.
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Nighthawk
New member
Username: Nighthawk

Post Number: 9
Registered: 5-2002
Posted on Friday, April 30, 2004 - 8:58 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thanks for the responces guys. The VR6 and VR7 are indeed the correct adjustments for power. But, when I cut R104 the radio will only key at the same low power as before but not modulate at all. The model of the board is PC621AA not the PC5833AA I stated last post. I've read on previous posts that the R104 needs to be cut on model 719A and mine is a 719. Does that matter? Thanks for your help.
Nighthawk
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Nighthawk
Junior Member
Username: Nighthawk

Post Number: 13
Registered: 5-2002
Posted on Tuesday, May 04, 2004 - 9:20 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Help Techs! Cutting the R104 only cut my limited modulation. I've since cut R102 and R103 without working. I've re-soldered these back. Surely there is a way to kick this radio. Please give me any feedback even from a Uniden Grant (similar radio).
Thanks ,
Nighthawk
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Tech548
Moderator
Username: Tech548

Post Number: 6
Registered: 5-2004
Posted on Wednesday, May 05, 2004 - 9:19 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Nighthawk

I'm suspecting the final is bad. Possibly what you are seeing on your power meter is the output from the driver. As I suggested in a previous post, replace the both of them and see what happens. It can't hurt.

Jeff.
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Weakeststation
Intermediate Member
Username: Weakeststation

Post Number: 272
Registered: 7-2002


Posted on Wednesday, May 05, 2004 - 11:26 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I'll second a bad transitor..
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Nighthawk
Junior Member
Username: Nighthawk

Post Number: 14
Registered: 5-2002
Posted on Monday, May 10, 2004 - 7:23 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Techs-
Where are these finals located on this radio? To replace them, I would get the same ones from Copper or would you suggest something better? (Could I rob from a different radio?) If Weakeststation is also right, which transistor woould you be talking about?
Thanks Guys,
Nighthawk

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