Pioneer Dates of Manufacture

[Bassblaster]

Sweet guide! i was able to see my SX-636 was made in september of 75

 

[So.Vox]

My PL550 was built in August of '77.

Very helpful!

 

[timind]

My PL-7 built in Sept 82 and my PL-S40 built 11 months later, Aug 83.
Very interesting thread.

 

[montrecott]

Great info. My SA-8100 was built in January of 1973, and my TX-9800 was built in October of 1980.

 

[Awesomeaudio]

This is a good thread.
Mine as follows:
SX-1000TW Multi Voltage (OG) July 1968
SX-450 Multi Voltage (WG) July 1976
SX-680 Multi Voltage (YE) May 1978
SX-690 Multi Voltage (Black Dial Version) (VJ) October 1975
SX-750 Multi Voltage (WF) June 1976
SX-750 120V (XK) November 1977
SX-780 Multi Voltage (ZF) June 1979
SA-7100 Multi Voltage (UI) September 1974
SA-7300 Multi Voltage (VJ) October 1975
SX-1050 Multi Voltage (*F) The first place letter is illegible. So 1976 has to suffice.
SX-1250 120V (XK) November 1977
PL-12R 240V (VJ) October 1975
PL-530 Multi Voltage (XH) August 1977
PL-530 120V (VI) September 1975
PL-570 120V (YB) February 1978
PL-570 220/240V (XG) July 1977
TX-5300 Multi Voltage (TBA)

 

[Awesomeaudio]

Just wondering if the circular sticker with FW bears any significance on the 1000TW.

 

[rcs16]

I now have a QX-9900, it has the same sticker on the back. On the first page of the service manual it says it is a QX-9900/FW. So that sticker identifies "FW" as the model configuration. Since these models have voltage selector taps for the transformer primaries, they only made one model configuration for all countries as far as I can tell. Some later models had various other country configurations, usually the transformer was different, has they would have a primary winding for a specific line V, most probably for cost saving reasons.
I see your AM bar antenna leads with the plastic sleeving/covering is the same as mine, stiff, lost its flex. In order to change going to have to un-solder the leads inside and remove the strain relief to change the sleeving.
Mine also has a broken antenna bracket, looks like some epoxy should be a band-aid quick fix.

 

[Awesomeaudio]

Thanks for the info there.
Regards to that clear sleeving, I hadn't given it much thought actually .
Doesn't really bother me all that much, but if I get my hands on a replacement sleeve I'll more than likely replace it.
I love this amp so it would be worthwhile to do so.

 

[TheBlueEagle]

Here's some additions to the data collection from part of our Pioneer stable:

SX-990(f) QD 42751 April, 1970
SX-1250 WC 3905598M March, 1976
SX-1280 YA 3602961S January 1978 (which fits with the original sales receipt dated May of 1978)
SX-1980 YA 3603984S January 1978
SX-3900 AI 3606094S September, 1980

SR-202W TF 2710920R June, 1973
PDM-500 KC3605024W May, 1990 (Matches date stamp on unit too)

An oddity I have is on a DVL-90 - It's serial is RIPPO 10282C. Date tag of September, 1997.

 

[Awesomeaudio]

I am assuming "Dr. Strangelove" is no longer with us, except in spirit, since he hasn't been here since late 2009?


I have also wondered about this too. Does anyone know what happened to him ?

 

[sx1010JBL]

Sx1010. Feb 1976
Sx680. Feb 1979

 

[zebulon1]

I just read a thread about "Dr. Strangelove". The member/friend said he was in Australia on a permanent walkabout.
Does any remember where I might of saw the thread/post?
Whats the link to the site he operates?

 

[zebra03]

I just read a thread about "Dr. Strangelove". The member/friend said he was in Australia on a permanent walkabout.
Does any remember where I might of saw the thread/post?
Whats the link to the site he operates?

http://www.audiokarma.org/forums/in...isit-from-the-doc-today.759335/#post-10334717

 

[Awesomeaudio]

This has been on the 1st page a little while. I wonder if he is talking about another thread possibly

 

[Aaron99]

I just bought a QM-800A quadrophonic amplifier. I have not found much information on them except that they were manufactured in the early 1970s. Where is the serial number on these?
There are only two numbers that I found.

On the back and inside on the left side of the chassis.

 

[Awesomeaudio]

I just bought a QM-800A quadrophonic amplifier. I have not found much information on them except that they were manufactured in the early 1970s. Where is the serial number on these?
There are only two numbers that I found.

On the back and inside on the left side of the chassis.

View attachment 880904 View attachment 880907

That's an intriguing situation. I did a quick search and from what I've seen, there should a be a plate fixed with 2 screws just above the AC outlets. It has the model and serial on it.
Do you have any holes around the top right of the unit anywhere ? Perhaps the plate was removed at some point. The pic showing the inked and pressed numbers looks very odd.

 

[captainclock]

I have a Pioneer Tuner model TX-6200 that the Serial Number on it doesn't seem to follow the same serial number convention as the rest of the Pioneer stuff does, the Serial Number on it doesn't start with two letters then a space and then a string of numbers, it starts out with a single letter no space then a string of numbers then a letter at the end with no space between the last number and the letter. How would one date how old this Tuner is?

 

[Awesomeaudio]

It's probably A Rondo maybe ??
Can you post some pics ?
[Edit]. Just looked online. It cant be a Rondo.
It looks like an early 70s model.
If you can post a close up of the serial number that could be beneficial

 

[captainclock]

It's probably A Rondo maybe ??
Can you post some pics ?
[Edit]. Just looked online. It cant be a Rondo.
It looks like an early 70s model.
If you can post a close up of the serial number that could be beneficial

I sure can, its a silverfaced unit, and I'm guessing its from the 1970s as the tuning dial backlight is blue and the tuner was mated with a Hitachi IA-600 Amplifier, Also the tuner in question does have an <E-P> mark on the tag which means my tuner came from a military store originally.

 

[Awesomeaudio]

I can see the 1st two placements as UL
That's a December 1974 unit.