What JFET to use to repair a Samsung TBMU24311IMB QPSK NIM?

[jim_cotton]

Since many of the FTA receivers are made in Korea it is no surprise that many
of them use the Samsung modules. My Traxis 4500 appears to have had the
front end ?JFET? fail. Does anyone have a replacement part suggestion?

I am guessing that it is an NPN 9 Ghz wideband transistor with specifications
similar to a philips BFG540W.... which is the wrong case size....

On page 4 of the data sheet the transistor is in the top of the photo showing
the input resonant and amplifier stage right after the dc blocking capacitor.

http://www.sem.samsung.com/cms/ifwe...code=D020&pname=QPSK NIM&loca=z&navi=overview

Any thoughts or suggestions are welcome.

Otherwise I think that I will be looking at a Fortec Classic or Mercury II. I have
a borrowed Coship CDVB2000 that I am using now.

Thanks.

 

[Hermitman]

It depends how much fun you want to have. I personally haven't had much luck replacing smc's. Just too small for me. If you're going to try, I think you should try a direct replacement. Otherwise, it's hard to tell what kind of gain or capacitance differences you'll end up with. You might want to change the entire module. They should be pretty cheap since they're used everywhere. Maybe you have a electronics wholesale store close by. Of course, if you're just looking to get back to receiving satellites without much effort and fuss buying a new receiver is the easiest way. Have fun.

 

[MrTim]

I believe your Traxis DBS4500 should still be under warranty. See http://www.dmsiusa.com/ra_form.htm for instructions (if you'd like to send it in). If you only see the standby light and cannot turn it on by remote, it's more than likely the power supply. We've had a abnormal failure in some of the DBS4500's due to a sub-standard capacitor supplied to the factory by a parts vendor. The good news is if you send it in, we'll replace the entire power supply for you.

You can contact me at: tim@dmsiusa.com
You can contact technical at: dmstech@dmsiusa.com

 

[jim_cotton]

Thank You to Tim and DMS International for providing support for this unit.

I was not expecting any support on a $100 piece of consumer electronics,
and I never thought to ask for any.