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PT9703 RF transistor - anyone know the spec on it?
Hi all,
I've tried Googling, but Advanced Semiconductor have screwed the search up with their worthless crap. What are the basic characteristics of this device? Po, Ft, Gain, Vsupply, typical application etc. Thanks, paul -- "What is now proved was once only imagin'd." - William Blake, 1793. |
Paul Burridge wrote: Hi all, What are the basic characteristics of this device? Po, Ft, Gain, Vsupply, typical application etc. 10 Watts up to 400 MHz, 10 dB, 28 Volt, UHF FM AM etc 73 Dan AC6AO / G3NCR |
Hi Paul,
Vague memory but afair it is a UHF (lower UHF) power transistor, maybe 20 watts or so, 24V or 28V (not a 12V type). Could be ok for the 70cm ham band but that might already be a stretch, probably better for 2m. Amps with devices like these didn't have a whole lot of gain when used at their upper frequency limits, certainly less than 10dB so you'd need something of about a quarter of the power you want as output to drive it. Again, this is from memory so I am not 100% sure. My hunch is that you probably can buy 12V versions in a similar power range for little money these days. Regards, Joerg http://www.analogconsultants.com |
"Paul Burridge" wrote in message ... Hi all, I've tried Googling, but Advanced Semiconductor have screwed the search up with their worthless crap. What are the basic characteristics of this device? Po, Ft, Gain, Vsupply, typical application etc. Thanks, paul -- "What is now proved was once only imagin'd." - William Blake, 1793. It's a UHF NPN power transistor. At 400 MHz, with VCC=28 V, and PO= 10W, the gain is 8.2 db (min). Maximum collector current is 1.25 amp, and max dissipation is 20 W @ 25C derated .114 W/C. Claimed collector efficiency is 60%. Moto must have second sourced this; it is in their 1991 RF book. Tam |
On Thu, 21 Oct 2004 16:24:04 +0100, Paul Burridge
wrote: Hi all, I've tried Googling, but Advanced Semiconductor have screwed the search up with their worthless crap. What are the basic characteristics of this device? Po, Ft, Gain, Vsupply, typical application etc. from TRW '83 PT9703B spec @ 400MHz Pgain 10Wout for Pin 1.5W Collector efficiency 60% Cob 12pF Icmax continuous - 1.25A - note that SOA curves limit at 1.125A. Vceo 30V Vces 60V designed for 28Vcc system Common-Emitter UHF Isolated package (? from mounting stud, I assume) Rthjc 8.8degC/W Tj 200degC limit Pdiss limit @Tc20deg = 20W RL |
Paul:
TRW PT9703: Max. Frequency: 400 MHz Power Output: 10 W Gain: 10 dB Vceo: 30 V (intended for 28 V supply) Vces: 55 V Thermal resistance (junction-to-case): 8.8 deg.C/W The lead with a diagonal cut corner is the collector. No, I don't have a data sheet, just an old short-form catalogue, so that's all the info I have (apart from a dimensioned drawing of the case). Steve |
"Tam/WB2TT" wrote in message
... "Paul Burridge" wrote in message ... Hi all, I've tried Googling, but Advanced Semiconductor have screwed the search up with their worthless crap. What are the basic characteristics of this device? Po, Ft, Gain, Vsupply, typical application etc. Thanks, paul -- "What is now proved was once only imagin'd." - William Blake, 1793. It's a UHF NPN power transistor. At 400 MHz, with VCC=28 V, and PO= 10W, the gain is 8.2 db (min). Maximum collector current is 1.25 amp, and max dissipation is 20 W @ 25C derated .114 W/C. Claimed collector efficiency is 60%. Moto must have second sourced this; it is in their 1991 RF book. Tam Yes, the "PT" was second sourced from TRW. gb |
On 21 Oct 2004 17:20:39 -0700, (Steve
Kavanagh) wrote: [snip] Thanks, all! p. -- "What is now proved was once only imagin'd." - William Blake, 1793. |
On Fri, 22 Oct 2004 13:30:18 GMT, "w9gb"
wrote: Yes, the "PT" was second sourced from TRW. like "SRF" from Motorola? 73, JM --- J. M. Noeding, LA8AK, N-4623 Kristiansand http://home.online.no/~la8ak/c.htm |
On Sun, 24 Oct 2004 01:37:21 +0200, J M Noeding
wrote: On Fri, 22 Oct 2004 13:30:18 GMT, "w9gb" wrote: Yes, the "PT" was second sourced from TRW. like "SRF" from Motorola? The Motorola part carried the same part number. RL |
On Sun, 24 Oct 2004 01:37:21 +0200, J M Noeding
wrote: On Fri, 22 Oct 2004 13:30:18 GMT, "w9gb" wrote: Yes, the "PT" was second sourced from TRW. like "SRF" from Motorola? Actually the TRW facility at Lawndale was purchased outright by Motorola sometime between 1987 and 1990. The PT9703 was never available from both mfrs simultaneously, so it was always single-sourced. RL |
I've tried Googling, but it might be an obsolete device?
Also interested to see any application for low noise RX pre-amplifier 73 Jan-Martin --- J. M. Noeding, LA8AK, N-4623 Kristiansand http://home.online.no/~la8ak/c.htm |
In article ,
J M Noeding wrote: I've tried Googling, but it might be an obsolete device? Also interested to see any application for low noise RX pre-amplifier 73 Jan-Martin --- J. M. Noeding, LA8AK, N-4623 Kristiansand http://home.online.no/~la8ak/c.htm You can find it at: http://www.semiconductors.philips.co...-SL_CNV_2.html Cheers, Dirk |
On Mon, 25 Oct 2004 08:57:49 +0200, Dirk Kautz
wrote: http://www.semiconductors.philips.co...-SL_CNV_2.html tnx! --- J. M. Noeding, LA8AK, N-4623 Kristiansand http://home.online.no/~la8ak/c.htm |
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