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Harman Kardon Citation 16
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Peter W.
Dec 30, 2023, 5:36:18 PM12/30/23
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I am trying to date this beast.
Serial Number: 07FH3C0
Line Fuses are inside, not exposed in the rear.
There are no 12 V fuses internally.
No ICs on the input side - all discreet.
Does have the LED readout.
Any thoughts?
Works well, after replacing the 4A fuses. They died from age, the elements had turned black and partially crumbled.
Peter Wieck
Melrose Park, PA
Serial Number: 07FH3C0
Line Fuses are inside, not exposed in the rear.
There are no 12 V fuses internally.
No ICs on the input side - all discreet.
Does have the LED readout.
Any thoughts?
Works well, after replacing the 4A fuses. They died from age, the elements had turned black and partially crumbled.
Peter Wieck
Melrose Park, PA
Phil Allison
Dec 30, 2023, 9:44:39 PM12/30/23
to
Peter W. wrote:
==============
This is the later version ( no ICs) sold from 1980 onwards.
.... Phil
==============
> I am trying to date this beast.
>
> Serial Number: 07FH3C0
> Line Fuses are inside, not exposed in the rear.
> There are no 12 V fuses internally.
> No ICs on the input side - all discreet.
> Does have the LED readout.
>
** Should be digit date codes ( week and year) on the filter electros and output transistors.
>
> Serial Number: 07FH3C0
> Line Fuses are inside, not exposed in the rear.
> There are no 12 V fuses internally.
> No ICs on the input side - all discreet.
> Does have the LED readout.
>
This is the later version ( no ICs) sold from 1980 onwards.
.... Phil
Peter W.
Dec 31, 2023, 8:02:44 AM12/31/23
to
Thank you!
> ** Should be digit date codes ( week and year) on the filter electros and output transistors.
This, I can check.
> This is the later version ( no ICs) sold from 1980 onwards.
I would have thought the same, but it lacks the internal fuses on the 12V power-supply, and the primary fuses are internal. This mirrors the original schematic (power-supplies), but for no ICs.
Per Orion Blue Book (not the most accurate):
citation 16 1976-1979 - Some overlap with the 16a, apprently. ICs stopped somewhere in production.
citation 16a 1978-1979 - slightly derated, no ICs.
citation 16as 1978-1979 - no LEDs, no ICs.
citation 17 1977-1979
citation 17s 1975-1979
citation 18 1977-1979
citation 19 1977-1979
The earliest photos I could find showed the fuses accessible externally, directly under the speaker jacks, either side of the power cord. So, given all this, I am trying to find someone who has an idea of that serial number. All others I could find (pictures) were straight numerics, no letters. But for one that was hand-written, and clearly a test-bed unit (with the external fuses, however). And, I also keep one-each 17, 18, 19 all with conventional S/Ns and reflect their respective OEM schematics accurately.
> ** Should be digit date codes ( week and year) on the filter electros and output transistors.
> This is the later version ( no ICs) sold from 1980 onwards.
Per Orion Blue Book (not the most accurate):
citation 16 1976-1979 - Some overlap with the 16a, apprently. ICs stopped somewhere in production.
citation 16a 1978-1979 - slightly derated, no ICs.
citation 16as 1978-1979 - no LEDs, no ICs.
citation 17 1977-1979
citation 17s 1975-1979
citation 18 1977-1979
citation 19 1977-1979
The earliest photos I could find showed the fuses accessible externally, directly under the speaker jacks, either side of the power cord. So, given all this, I am trying to find someone who has an idea of that serial number. All others I could find (pictures) were straight numerics, no letters. But for one that was hand-written, and clearly a test-bed unit (with the external fuses, however). And, I also keep one-each 17, 18, 19 all with conventional S/Ns and reflect their respective OEM schematics accurately.
Peter W.
Dec 31, 2023, 4:36:09 PM12/31/23
to
More information:
A well informed former HK rep sent some information:
a) Look for the ICs - they will be there, somewhere. They were, back of the driver boards.
b) That S/N (alphanumeric) suggests that the unit was assigned to a factory rep ahead of release to generate orders. Check the S/Ns on the driver boards. Date codes are November of 1975.
c) Internal fuses, ICs mounted differently from production, alphanumeric serial number = advance model. In his opinion.
Icing on the cake: no codes on the filter caps. And the two output transistors I checked were entirely blank. They looked like they were cleaned, not issued that way. Two slightly different types of feet. An HK marked metal toggle on/off switch different from any others I have seen, and so forth.
And there it seems to be.
A well informed former HK rep sent some information:
a) Look for the ICs - they will be there, somewhere. They were, back of the driver boards.
b) That S/N (alphanumeric) suggests that the unit was assigned to a factory rep ahead of release to generate orders. Check the S/Ns on the driver boards. Date codes are November of 1975.
c) Internal fuses, ICs mounted differently from production, alphanumeric serial number = advance model. In his opinion.
Icing on the cake: no codes on the filter caps. And the two output transistors I checked were entirely blank. They looked like they were cleaned, not issued that way. Two slightly different types of feet. An HK marked metal toggle on/off switch different from any others I have seen, and so forth.
And there it seems to be.
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