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Superscope R-1232



Superscope R-1232




Comments

Re: Superscope R-1232

Power supply board and amp board are almost identical to those of Marantz 2200 2215B and 2216 so you can use one of their service manuals. So this little Superscope is quite a solid built receiver.

lverwegen's picture

Re: Superscope R-1232

Hello,
I own a Superscope R-1302. Which Marantz is comparable?
Greetings, Lowie.

Re: Superscope R-1232

Hi Lowie!

The R-1262 is nothing else but a later design (silver scale) version of the "blue" R-1240 and the latter definitely is a combination of Marantz 104 tuner and 1040 amp (I checked this with the 1040 service manual).

The R-1302 is nothing else but a later design (silver scale) version of the "blue" R-1270 and I was ** told ** that the R-1270 has a 1070 amp inside. I did not check into that (no R-1270 or R-1302 so far in my posession) but for a start I'd try the Marantz 1070 service manual (for the amp section) and check whether part numbers and power transistors are the same. The tuner most likely is similar to that of R-1262 / R-1240 (except for external AM antenna) thus try Marantz 104 service manual.

All informations on Superscope R-1270 wiil fit for your R-1302, as well.

Greetings, Andreas

lverwegen's picture

Re: Superscope R-1232

Hello Andreas,

Thanks for your information. Since a few weeks, I own a R-1270 too. I'm a big Superscope fan and collect them. In my collection are a R-1220, four R-330's, three R-340(B) and two R-350's, and also a set of A-245, T-210 and CD-302A. And of course the R-1302. I like them very much. Great seventies design and good warm sound. In Holland they are not very expensive. For example: the R-1302 cost me 60 euro. The rest was cheaper. So the combination of great design, warm sound and good price makes it attractive for me. :-)

With which Marantz receivers can I compare the R-330, R-340 and R-350?

Greetings, Lowie from the Netherlands.

Re: Superscope R-1232

Hi Lowie,
Nice collection you've got
I have a question About the R-1220
I just bought at a sale "kringloopwinkel"
Wat is the meaning of the switch in the
Back near the phono input
It says, MAG -CER ???
Ps i realy love the sound and looks
Of it
Also greetings from Holland

lverwegen's picture

Re: Superscope R-1232

Hello,

JaS gave the right answer. That's what it's for.
I hope you have a lot of fun with your R1220.

Greetings,
Lowie.

Re: Superscope R-1232

The switch changes the gain of the phono stage, MAG for moving magnet phono cartridges, CER for ceramic phono cartridges

rlisin's picture

Re: Superscope R-1232

I know it's been almost 3 years, but I need a clarification: does this switch only change gain of the phono stage (but not the EQ), or does it bypass the phono stage altogether, effectively switching to line input?

lverwegen's picture

Re: Superscope R-1232

Hello,
I have a servicemanual from a Superscope A-235 amplifier that also has a switch for MAG or CER element. In the schematic diagram I can see that the resistors (left and right) of the circuit are different (56k for MEG and 220k for CER) so I think that the output voltage of a ceramic element is lowered by the resistors to the voltage output of a magnetic element. In the specifications, I see input sensitivity of 3 mV for MAG and 200 mV for CER. I made a screenshot of this part of the schematic diagram and the specifications.

I hope this helps you.
Greetings, Lowie.

rlisin's picture

Re: Superscope R-1232

OK, so the switch only changes the input sensitivity without bypassing the EQ. Thanks!

lverwegen's picture

Re: Superscope R-1232

Hello.
If you want to have a closer look, you can download the servicemanual of the A-235 amp on this site.
Greetings.

rlisin's picture

Re: Superscope R-1232

Thanks lverwegen, I know but there's no need to look at the full service manual, the screenshot above clearly shows that the switch and corresponding resistors are before the phono stage.

Re: Superscope R-1232

Ceramic charts do RIAA eq. almost perfectly by themselves so, they don't need eq. but perhaps a slight correction, and they can be connected to linear inputs; so ceramic position must be linear / almost linear.

rlisin's picture

Re: Superscope R-1232

Some ceramic carts don't need eq., some do. Just like some "Phono Ceramic" inputs in amplifiers and receivers have eq. correction and some don't. The point of my question was to find out whether phono input in Superscopes can double as an additional line level input. Apparently it can't because eq. correction is not bypassed.