I know eBay lists 2SC1971 transistors but most are probably fakes, and taking 3 weeks or so to discover whether it is a fake does not enthuse me.
What I am wanting to buy is a "real" new 2SC1971 device, a 175MHz TO220 device as used as a pre-driver in some Icom transceivers.
The direct equivalent is an NTE342 and that would suffice.
I am awaiting a reply from Icom re price and availability, but in the meantime, have any Forum members got one to spare (P&A please) ??
Doug VK4ADC
GOT ONE - THANKS FOR READING !!!
Hello Doug
Regarding 2SC1971 transistors: I believe an MRF237 is also equivalent, although not a TO220 package.
A 'real' 2SC1971 is a very rare commodity, apparently, because they haven't been made by the original manufacturer for decades.
I believe Eleflow is a reputable supplier if you want a suitable replacement.
http://www.eleflow.com/
Ian
I found Eleflow during my web searches and had a look at their offering earlier. There is always a chance that someone in VK has one that they bought as a spare for a long-defunct radio. If I had to, I would accept a "pull" from a non-working Icom.
The device has to be a TO220 to be able to effect a repair in the Icom device and there isn't room to play with alternatives. I can't go too far off the characteristics of the original either as it is running in linear mode rather than Class C.
Anyone else got suggestions - or the device itself?
(07-02-2018, 05:36 PM)VK4ADC Wrote: [ -> ]I found Eleflow during my web searches and had a look at their offering earlier. There is always a chance that someone in VK has one that they bought as a spare for a long-defunct radio. If I had to, I would accept a "pull" from a non-working Icom.
The device has to be a TO220 to be able to effect a repair in the Icom device and there isn't room to play with alternatives. I can't go too far off the characteristics of the original either as it is running in linear mode rather than Class C.
Anyone else got suggestions - or the device itself?
Sorry old man not want you want....
But Interesting to look into my transistor collection [first time for many years] and found a MRF237 [TO5] final for a kenwood TR2200 portable 2 metre rig, not what you want ...
Also found 2SC2290 and MRF 422 matched pair finals for HF rigs from way back.
MRF492 finals matched pair [6 metre amp finals?]
MRF 455 finals
2N5245 RF jfet i think
and 3SK121
Amazing what you find when prompted hi
cheers and thank you for the forum
vk6ro
e&oe
"
Also found 2SC2290 and MRF 422 matched pair finals for HF rigs from way back.
MRF492 finals matched pair [6 metre amp finals?]
MRF 455 finals
"
I think you need to work out what $$$ you want for those devices as you may get some enquiries from people chasing them - that is if you don't need to keep them as spares because the original radios have 'moved on'.
Doesn't help me but you
have "advertised" them in the right place
