HISTORIC TRANSISTOR COLLECTION IDENTIFIER 2N34 Copyright © 2003 by Terry Hosking. All Rights Reserved.
DEVICE ID	MFG	DC	YEAR	TYPE/APP	COND	QTY	PHOTO
2N34	RCA	CH	1954	PG	New?	1
		CI	1954	PG	New?	1
2N34 First Alloy junction [PNP] device assigned a “2N” EIA number. Early 2N34's are scarce to very rare.. The later unpainted metal case/black stamps Sylvania type is by far most common. The earlier black painted Sylvania types with yellow or green stamps are MUCH scarcer. The 2N34 ID was originally assigned to RCA. The RCA version [tall, white plastic with glass header] is "VERY RARE". The RCA prototype for 2N34 was TA-153. I have one of these from Jack Ward. These are so rare they are “irreplaceable” !! TA-153 lead spacing is the same as for Raytheon black CK72*. All 2N34’s have the std. lead spacing as found on other early transistors. RCA 2N34’s supplied new with socket length leads. Refer to Sylvania 2N34/35 packaging evolution described following 2N35. Very rare type with plastic encapsulation, glass header. The date code is rather cryptic, and may refer to a mfg location and production run, rather than a date. This transistor is more uniform shape than earlier ones, so suspect mid to late 1954 mfg. Nice black stamps on cream colored oval plastic or epoxy case. These were found in a lot of eight, and with new 2N46’s. I’m assuming these are new, but the socket length leads make it difficult to prove. Very clear black stamps, no sign of mechanical wear, scratches, or damage. Both of these are electrically GOOD. Unusual!! Neither of these examples show the “USA” or a date code on the reverse as is shown in the center picture. It appears that the reverse markings are only found on some examples.
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