Copper Talk » Ask The Tech » Radio's Mobile » Archived Messages » How do I make my 148 receive better? « Previous Next »

Author Message
Top of pagePrevious messageNext messageBottom of page Link to this message

Jameslarson
Intermediate Member
Username: Jameslarson

Post Number: 119
Registered: 4-2006
Posted on Sunday, May 14, 2006 - 1:10 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Hi. Is there a mod that can be done to "clean up" the receive in my 148, or just to simply make it better? I seem to be transmitting better than receiving. Any thoughts? Thanks

PS---148 5 pin side mount
Top of pagePrevious messageNext messageBottom of page Link to this message

Bruce
Senior Member
Username: Bruce

Post Number: 3834
Registered: 9-2003
Posted on Sunday, May 14, 2006 - 2:42 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

in what way ?
Top of pagePrevious messageNext messageBottom of page Link to this message

Kid_vicious
Senior Member
Username: Kid_vicious

Post Number: 1589
Registered: 9-2004
Posted on Sunday, May 14, 2006 - 6:06 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

replace TR14 with a 2SC2999 or an NTE107.
replace TR19 with the transistor you just removed from the TR14 spot (2SC1674).

replace D1,D2,D21,D22 with 1N6263's or NTE583's.

you will really like the results.
do a receiver tune up on L4, 5 and 6 afterwards for max S-meter reading. (dont try to tune to an S-9 signal. a clear channel is best.)

also, a complete receiver alignment is a good idea.
here's a link to a great tutuorial on tuning up your 8719 chassis.
all the parts numbers are for your 148.
http://www.copperelectronics.com/cgi-bin/discus4/show.cgi?tpc=34&post=113535#POST113535

feel free to ask me anything. i wrote the article so i should be able to answer your questions about it.
good luck,
matt
Top of pagePrevious messageNext messageBottom of page Link to this message

Jameslarson
Intermediate Member
Username: Jameslarson

Post Number: 122
Registered: 4-2006
Posted on Sunday, May 14, 2006 - 10:57 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

Thanks for the info. Where do I get all those exact part numbers from? Does Copper sell these parts? Thanks.
Top of pagePrevious messageNext messageBottom of page Link to this message

Kid_vicious
Senior Member
Username: Kid_vicious

Post Number: 1599
Registered: 9-2004
Posted on Monday, May 15, 2006 - 11:26 pm:   Edit Post Delete Post    Move Post (Moderator/Admin Only)

no copper does not sell those parts.
there is a guy on internet auction site's selling the transistors for a good price.

the diodes you should be able to get from mouser electronics. they have no minimum order.
you might be able to get everything there.
i dont know.
a good idea is to do a google search on the part numbers, and see if any big stores pop up.
good luck,
matt

Add Your Message Here
Post:
Username: Posting Information:
This is a private posting area. Only registered users and moderators may post messages here.
Password:
Options: Enable HTML code in message
Automatically activate URLs in message
Action: