September 10, 2012 - 11:04 am|
Congratulations on getting your ST-84 out of mothballs! The Eico voltage chart is incorrect, in this case. Although the channels are different, in that only Channel-1 is being driven for the measurements, that should have only minor effect on the DC operating point. My own measurements of an ST-84 (at idle) showed:
Pin-1 Pin-6(These were just an initial evaluation and should not be taken as ideal; just one data point.)
V1 173 66.3V
V2 172 68.2
I have heard it said that Eico voltage charts are too often flawed. My own experience is consistent with this.
Note that these voltages should be measured with a high input resistance meter (like most DVMs and VTVMs) and not a VOM.
I will be happy to help if you have further questions.
September 10, 2012 - 10:48 am|
|I am in the process of evaluating the ST-84 that I built 47 years ago. The pre-amp has not been used for about 30 years. |
My question deals with the DC voltages listed in table 5-2 (page 12) the manual. The plate voltages are not the same for V1 and V2. Do you believe this is correct?
Thanks for any insight.
July 05, 2011 - 10:51 pm|
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