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PH 9117 TRANSISTOR

sparks325

Sep 29, 2010
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Hello,
Does anyone know where to view a data sheet on this transistor.
Thanks
 

davenn

Moderator
Sep 5, 2009
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Hello,
Does anyone know where to view a data sheet on this transistor.
Thanks

a tricky one mate what sort of cct is it in? maybe we could suggest a device that will do the same job ?

D
 

Militoy

Aug 24, 2010
180
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Aug 24, 2010
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180
Not too much info available on this part - It looks to be a M/A-Com 500W 1 GHz transistor - that's either special order, or limited production / obsolete. Nothing at all up on Tyco - M/A-Com website.
 

sparks325

Sep 29, 2010
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It is in a transmitter that we (another department) service here at work. I have access to a few and thought they may be useful in a home brew
Linear HF amp for ham use. I was looking at the prices of the final drive transistors and got sticker shock.
 

davenn

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Sep 5, 2009
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It is in a transmitter that we (another department) service here at work. I have access to a few and thought they may be useful in a home brew
Linear HF amp for ham use. I was looking at the prices of the final drive transistors and got sticker shock.

ok thats a good start :) now tell us what the rated output power of the amp is ?
and is it a single transistor output or are there 2 devices in parallel for that rated output ?
and is it a 12V or a 28V powered amp they are the 2 common voltage ratings of
transmitting transistors


D
 

sparks325

Sep 29, 2010
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Thanks for the quick response. The circuit that they came out of had them in parallel with their bases grounded and +45 vdc on their collectors.
Looks like the RF came in through a tuned circuit on the emitter and went out via the collector. In that configuration they were producing 1000 watts at around 1Gig. The reason I was looking for a data sheet was to see if they could be used at a frequency between 3-30 Mhz. I’d be happy with 100 to 200 watts.
 

davenn

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Sep 5, 2009
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Thanks for the quick response. The circuit that they came out of had them in parallel with their bases grounded and +45 vdc on their collectors.
Looks like the RF came in through a tuned circuit on the emitter and went out via the collector. In that configuration they were producing 1000 watts at around 1Gig. The reason I was looking for a data sheet was to see if they could be used at a frequency between 3-30 Mhz. I’d be happy with 100 to 200 watts.

ok

yeah I havent been able to find any info either. With all my work in RF I would suspect that they are likely to be what is called "Controlled Q" devices that generally work over relatively narrow bandwidths maybe a couple of 100 MHz at the most.
(not all transistors are like that .... these ones may not be) But I would also hazard an educated guess that if they are designed for ~ 1GHz, I would be suprised if they would work at 3- 30 MHz mainly because of the internal makeup of the device to allow it to work at 1GHz without internal/self oscillation etc etc

I often come across some excellent devices that I would love to use on various Amateur radio bands but either because of lack of info like you have also found, or narrow bandwidth
I cant use them :(

edit.... ohhh and the other reason for the lack of info on some devices is cuz they were specifically built for a customer to their requirements and the manufacturer wont release info for the device :(

cheers
Dave
VK2TDN
 
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