harris Z ampifier drawers

[Imlivinontheair]

All,

Have a friend with a project. He has some dead modules for a Harris Z series.

Does anyone out here have any spares for sale or ideas how to get these rebuilt???

Thanks.

 

[jboyd]

1. have prayer
2. send to Harris for repair (or swap)
3.write BIG check.
I would not attempt personal repair JBI

 

[Randal Marshall]

These are not too difficult to repair, you can check the MOSFETS with a VOM and replace the shorted ones. It simply takes a little patience to un-solder and more importantly re-solder the new one in. The replacement part is a BLF177 by NXP. More:

http://www.engineeringradio.us/blog/2009/07/repairing-a-solid-state-fm-transmitter-module/

Have fun!

 

[bilco]

Two different Harris field techs and the instructors when I went to "Z" school all recomend letting Harris rebuild them There are freq/phase critical adjustments that need to be made that can be upset by a fet change.

 

[littlejohn]

Z analog, or Z hd, or Z HD+? There's a difference. I used to just send them the pallets for repair. Then I figured out wha was killing them was they were getting loose on the heat sinks. Tighten the mounting screws regularly, no further troubles with them in several years.

 

[OKCRadioGuy]

Unless a guy is set up with the proper jig and test equipment and is VERY careful with parts selection, etc. there's a possiblity of creating problems and even spurious emmissions by repairing them in the field. It's not impossible to do, just dangerous RF-wise if a guy just thinks replacing parts like an audio amplifer is all that's involved.