Copper Talk » Modifications » Radios » Basic mods for washington « Previous Next »

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715
Posted on Sunday, November 04, 2001 - 9:22 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

whats a basic mod i can do on a uniden washington?
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Tech181
Posted on Monday, November 05, 2001 - 12:04 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

715,

Do you have the one with the 8719 PLL or the 858 PLL?

Steve
Tech181
Tech181@copperelectronics.com
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715
Posted on Monday, November 05, 2001 - 6:43 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

8719 PLL
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307
Posted on Monday, November 05, 2001 - 7:21 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

1) Mount 2 SPST toggle switches in a good loacation on the radio.
2) Locate and unsolder the 11.1125mhz Crystal and replace it with a 11.3258 mhz crystal.
3) Locate pin 10 and 11 of the MB8719 chip. Cut the traces that are connected to them.
4) Solder two wires across the pin 11 and the cut to one switch. Solder two wires across pin 10 and the cut to the other switch.
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Tech181
Posted on Tuesday, November 06, 2001 - 12:06 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

He beat me to it!

Steve
Tech181
Tech181@copperelectronics.com
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715
Posted on Tuesday, November 06, 2001 - 8:33 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

and what does that do?
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Tech181
Posted on Wednesday, November 07, 2001 - 12:05 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

That gives you 26.815 - 28.045.

If you decide to do this mod, let me know. I will give you the "road map" for the freqs/channels.

Steve
Tech181
Tech181@copperelectronics.com
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715
Posted on Wednesday, November 07, 2001 - 10:08 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

ok, i think im going to do this mod
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Sporthd68
Posted on Thursday, January 17, 2002 - 8:51 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

DO YOU HAVE THE 11.3258 CRYSTAL?? I HAVE BEEN E-MAILING YOU PEOPLE ABOUT THIS FOR A WHILE NOW AND NO RESPONSE. IF YOU DSO HOW MUCH IS IT AND HOW CAN I ORDER IT, ON-LINE OR DO I HAVE TO CALL FOR IT???
THANKS
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307
Posted on Friday, January 18, 2002 - 9:06 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Sporthd68..Pull back on the riens on those horses..I have never seen you ask for a crystal on the Forum. I know you may be excited but it takes time...The fastest way to get a crystal is to call one of 100 crystal manufactures. I recommend 1-800-JAN-XTAL. The cost is about 20 bucks...

307
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Jyd
Posted on Friday, January 18, 2002 - 12:59 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

pull back on those riens,thats funny.
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Marconi
Posted on Friday, January 18, 2002 - 8:31 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

I had a friend's Uniden Washington over, that I was going to show a fella just last week. Several months ago the clarifier was fixed to TX/RX together. The range was not very fast or wide. It worked very smoothly and was centered at top dead center at 12:00 as verified by other stations on center frequency as it should.

I was using it pretty steady off-and-on for about two hours. I was talking to the guy that owned it and all of a sudden the thing just went berserk, up and down frequency, on TX and RX. We both heard this happen. It settled down a little and we agreed to turn it off and let it cool, as the problem was thought to be heat related. No unuasual heat was noticed anywhere about the radio, however.

Thirty minutes later it was turned back on and a contact was made with the same station as before. Now the clarifier had to be adjusted in order to get on frequency. It was now off top dead center. It was high, and had to be dialed in at about 10:00 in order to get on frequency. The freq did not change for several minutes. Then the wobble happened again. The Washington was returned to the owner.

It has been sitting in the repair shop for about a week now and they have not been able to dulpicate this intermittent. I also noticed that when touching the channel selector, very gingerly, it seemed to make a little shift in frequency as well even before it went haywire again.

What do you think may be wrong. I am not a Tech and know very little about the insides of a radio.

Marconi
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307
Posted on Friday, January 18, 2002 - 9:17 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

You may not believe this but the channel selector does create trouble with the Washington and there is a cure..DO THIS WITH CARE!!

Remove the channel selector knob to get at the shaft.Insert the shaft into a standard hand drill and lightly tighten the chuck keeping the drill straight and level. "Spin" the shaft at full throttle with the drill for about 6 seconds. Remove the drill and put the selector knob back on. Your problem will be gone. This process cleans the contacts as well as removes the grease that is used to hold the bearing inplace during manufacturing...
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Taz
Posted on Friday, January 18, 2002 - 9:48 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

haha.

I know somone that did that to a cheap midland and it worked great but the radio spinned while he was doing that and it bent the shaft
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Simrik
Posted on Sunday, January 26, 2003 - 5:16 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

g-day mates
rick here
can anyone help me out with tune up specs for a uniden washington with the 8719 chip, it,s really down on power.and also if possible the schematics for this radio.
will be waiting with baited breath, thank you guys
delta tango 143 down under
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Hootyal
Posted on Sunday, January 26, 2003 - 11:50 am:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Howdy Simrik,
I'm not a tech...don't pretend to be one but I found this site that helped me out....
www.angelfire.com/biz5/radio1/Doughboy_page3.html
Hope this helps...HootyAl
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Hootyal
Posted on Sunday, January 26, 2003 - 1:21 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Anybody know of a super swing mod for this radio? A diode & resistor combo perhaps? Thanks HootyAl.
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Doughboy40
New member
Username: Doughboy40

Post Number: 3
Registered: 12-2007
Posted on Wednesday, May 07, 2008 - 7:36 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

can anyone help me out with tune up specs for a President Electronics president washington Home base with upper and lower side band, it,s really down on power on am, I am using a Antron 99 omni dirtiononal ectional antenna with it and can only get about 4-6 miles transmit and recieve with it and also if possible the schematics for this radio.
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Guardian
Member
Username: Guardian

Post Number: 71
Registered: 5-2004
Posted on Monday, August 18, 2008 - 2:24 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Can any one tell me the mod to put extra channles in a washington base with the 858 pll and if the lights are dim dose that mean the voltage reg is weak . thanks Guardian

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