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electronics, Dynaco Owners, take note...
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Dynaco Owners, take note...
 Dynaco Owners, take note... 
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Robert Wi
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Dynaco Owners, take note...
Awhile ago I built from a kit a DYNACO STEREO 120
transistor amp (60w/channel). This was probably
in the late 60's - now you know how old I am :-).
I also built a PAT-4 stereo pre-amp which is still
going strong (course, I'm no longer a "golden ear" :-(
After 25 years of faithful service, I've lost the output
from one channel. In trying to figure out where the problem
might lie (I can't find the construction manual - big
suprise after 25 years), I did some looking at replacement
transistors. The matches I was getting on the numbers seemed
totally different than what was in the amp - even different
form factors. Sure enough, it turns out DYNACO seemed to use
house numbered transistors. Recently I ran across a
substitution guide which had specific DYNACO substitution
specs. Warning - I havn't yet tried to do a replacement
with any of these, so I can't guarantee they will work -
but here is what the guide says...
DYNACO HOUSE NUMBERED TRANSISTORS
from the TCE SK (previously RCA?) Series replacement guide
(available from Newark)
Dynaco number SK equivalent
540115
15V
540405
5A1
540543
43A
543148
3100
544012
3311
544015
3031A
544322
3848
561356
3846
562415
3053
564289
3715
564671
3025
567032
3441
567042
9236
567070
3247
571104
3621
571844
3036
572001
3512
572002
3512
572010
3250
572020
3117
572108
3444
572109
3444
572436
3024
572440
3103A
572683
3444
574001
3199
574003
3512
574061
3638
574844
3297
577015
9459
577018
3245
577019
9459
577020
3444
577031
3440
577041
9243
587009
3674
587011
9173
587012
3129
587013
3593
587028
3525
587710
3565
587740
9146
597462
3746
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11/30/2019
electronics, Dynaco Owners, take note...
- Bob Wier
---------- insert favorite standard disclaimers here ----------
home of the mc68hc11 mailing list
"Springtime in the Rockies - time to smell flowers, ride trains
mow the clover, sleep late, count the stars, watch the birds"
Mon, 07 Nov 1994 14:25:21 GMT
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