is it ok to used 2n3904c instead of 2n3904 in bitx v3 smd version

K Vijayakrishnan All Messages By This Member #23893 ?I have a stock of?2n3904c 's. Is it ok to replace the Q7( output of oscillator VFO) with?2n3904c.
M Garza #23928 Even though??the schematic shows a different transistor number, the boards are built with 2N2904 SMD transistors. Should be safe to use. Marco - KG5PRT
John Backo All Messages By This Member #23935 Typo. Make that MMBT3904 transistors. Others will work also, even the BC849 to 30m or so, though its F(t) is 100 MHz. Check the data sheet. The most important criteria are Vceo and F(t). And noise. john AD5YE
M Garza #23936 Thanks for catching that, John. Marco - KG5PRT? toggle quoted message Show quoted text On Mar 24, 2017 5:25 PM, "John Backo via Groups.Io" <iam74=[email protected]> wrote: Typo. Make that MMBT3904 transistors. Others will work also, even the BC849 to 30m or so, though its F(t) is 100 MHz. Check the data sheet. The most important criteria are Vceo and F(t). And noise. john AD5YE
K Vijayakrishnan All Messages By This Member #24063 Thanks for the info john , Marco and Garza. The 2n3904c was described as a switching transistor while the 2n3904 as a small signal transistor. Thats why I had a doubt. F(t) is certainly matching. I have assembled it in the bitx40 and is working well.

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