galaxy 959 coil chain problem in receive

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9Lives
Newbie
Newbie
Posts: 5
Joined: Tuesday 29th Jan 2013, 13:23
First Name: Grant
Location: georgia

galaxy 959 coil chain problem in receive

Postby 9Lives » Saturday 23rd Feb 2013, 16:03

Radio Make and Model: galaxy 959
PCB Number:
PLL Number:
Test gear available: scope, bird, dmm
Symptoms: l5, 6, 7 no rf gain

What is working: see below

What has been tried: belle

Did it suddenly happen ?:
Anything else that may be of help?:

I don't have much of the info on me. I'm fairly skilled. Just blew it this time. I had a crushed core in l7. And five. L7 was damaged so I removed and replaced with a coil from a different radio. While tuning I ran it down to low and saw a spark.. I suspected the set of fets and replaced with 2sk117. Nut perfect match but should work?..also suspected rf amp so replaced with a removed transistor from a148 I had. The coils are um effected. Voltage on fets. L8 is non effected and rf gain pot is null. There is an area around the coils that has no voltage.

Tx is fine. This stemmed from whatever I did at l7. Diodes attached to fets seem to be ok but inductor side of l8 0 volts and after. Please help, I'll be more thorough later. On the go. Thanks in advance

timrim
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Posts: 257
Joined: Thursday 29th May 2008, 10:11
Location: Ohio

Re: galaxy 959 coil chain problem in receive

Postby timrim » Tuesday 19th Mar 2013, 9:29

Was the original FET a SK45?

9Lives
Newbie
Newbie
Posts: 5
Joined: Tuesday 29th Jan 2013, 13:23
First Name: Grant
Location: georgia

Re: galaxy 959 coil chain problem in receive

Postby 9Lives » Tuesday 19th Mar 2013, 17:59

No they were j310. Before I understood I used a wrong trimming coil. I was adjusting l7 and saw 2 sparks. I figured it was the gates.


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