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WTB KSA1381 and KSC3503

Wanted to buy
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#2
finwbu

For Sale Thread 'Fairchild KSC3503 ESTU & KSA1381 ESTU'

This are Fairchild very hard to find KSC3503 ESTU & KSA1381 ESTU gain grade. The Hfe verified to be between 160 - 175. Minimum selling 20 pair . The complement KSA1381 ESTU is available from Mouser and plenty of those in stock, the KSC3503 is only available in D grade. One pair KSA1381 ESTU and KSC3503 ESTU will be 1.50 euro.

The prices do not include PayPal and shipping costs. Shipping from Finland. PayPal is accepted, the buyer pays the additional 5% PayPal fees. Or Payment as PayPal / Friend than the shipping costs for the EU are 9€ as standard ( PayPal friend) or 19€ by registered...
 
#6
You can find their equivalents from Profusion in UK, unfortunately they are not yet in stock but reported to be on the way by member @Transistorlegacy .

T

Thread 'New transistor source'

Hi everyone

I've been working professionally with solid state amplifiers for over 3 decades , and have been surprised by the sudden surge of devices going EOL. I believe that traditional class AB amplifiers are not going away, but are transitioning away from the mainstream to a boutique market. Valve amplifiers saw this happen a long time ago. With that said, there are a lot of high end solid state amps being built, and specialized parts sources are out there to supply them. I would like to list a number of sought after device type easily available, in some cases with a different part...
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T

Post in thread '2SC3503E & KSA1381ESTU Group Buy'

I do hope the refunds go smoothly for those who will need one. Mouser / TTI is very good. We have encountered issues in the past with some of the others when it came to refunds.
At least the KEC parts will be really complementery in the same good gain rank. The ON parts have been "D" for one and "E" for the other, for a number of years. The KTA1381 , KTC3503 is working well for us in commercial product. They are the VAS stage in this amp. DC offset no longer requires a servo because of the better complementary match, making the revised board simpler.
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https://eu.profusion.uk/de_en/kta1381-y-u-ph
https://eu.profusion.uk/de_en/ktc3503-y-u-ph
 
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