[Roadsters] Radio Schematic

Sun Nov 20 17:54:37 MST 2022

Will do, but for now, the electrolytic capacitors are all the ones that have +/- polarity noted on the schematic.  One of them is a large 500mF one that hangs off the incoming power line, and the rest of the electrolytics are little “can” styled ones on the circuit board, The paper capacitor is a big wax covered thing (5mF, 500v) that is wired up by the speaker output wires.  Paper capacitors went away in the early ‘70s, and would generally be replaced with a “film” capacitor (usually a polypropylene or some other plastic as the dielectric instead of paper).  For more details on re-capping, https://antiqueradio.org/recap.htm#identifying is a good reference and also informative on what to use if you can’t fine anything with the exact capacitance and/or voltage rating.  

I’ll try to get some before and after pics to post also, but like I say, it may be a while.

-Dan  

From: Greg Messemer <gmessemer at gmail.com> 
Sent: Sunday, November 20, 2022 4:25 PM
To: Dan Heinze <roadster at san.rr.com>
Cc: datsun-roadsters at autox.team.net
Subject: Re: [Roadsters] Radio Schematic

You should post all the MOUSER parts on 311 with a photo of what you plan on replacing. I have 2-3 radios and it would be good to know what CAPs to replace and if you get any better audio or more channels afterwards, and others may join in and give some other tips.

Greg

On Sun, Nov 20, 2022 at 4:03 PM Dan Heinze <roadster at san.rr.com <mailto:roadster at san.rr.com> > wrote:

Thanks to all who responded.  The schematic that Greg attached appears to be a better copy than the one in the radio user’s manual on 311s where some of the component values are not clearly legible.  I got all the electronics and controls removed from the case yesterday and have a Mouser Electronics order for all the electrolytic caps and the one big paper cap ready to go.  There’s only one electrolytic that is visibly bad, but always a good idea to replace all the electrolytic and paper capacitors.  The ceramic and mica caps rarely go bad.  I also found a questionable antenna connection.  Will repost when I get around to working on it… though that may not be until after the holidays.

Thanks / Dan

From: Datsun-roadsters <datsun-roadsters-bounces at autox.team.net <mailto:datsun-roadsters-bounces at autox.team.net> > On Behalf Of Greg Messemer via Datsun-roadsters
Sent: Sunday, November 20, 2022 1:24 PM
To: datsun-roadsters at autox.team.net <mailto:datsun-roadsters at autox.team.net> 
Subject: [Roadsters] Radio Schematic

The Radio Schematic ii in one of the last pages of the manual.

On Sun, Nov 20, 2022 at 11:45 AM <datsun-roadsters-request at autox.team.net <mailto:datsun-roadsters-request at autox.team.net> > wrote:

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Today's Topics:

   1. Re: Anyone have a roadster radio schematic? (Stephen Webber)

----------------------------------------------------------------------

Message: 1
Date: Sat, 19 Nov 2022 12:38:23 -0800
From: Stephen Webber <sewebberlaw at gmail.com <mailto:sewebberlaw at gmail.com> >
To: Pat Horne <patintexas at icloud.com <mailto:patintexas at icloud.com> >
Cc: Dan Heinze <roadster at san.rr.com <mailto:roadster at san.rr.com> >, datsun-roadsters at autox.team.net <mailto:datsun-roadsters at autox.team.net> 
Subject: Re: [Roadsters] Anyone have a roadster radio schematic?
Message-ID:
        <CAM_ShUNkyZzCVS+qbqs5S=4Sj+pcrmPqBjoT8kpgKRA7wgX0xA at mail.gmail.com <mailto:4Sj%2BpcrmPqBjoT8kpgKRA7wgX0xA at mail.gmail.com> >
Content-Type: text/plain; charset="utf-8"

I have the radio schematic for the positive ground radio in my 1963 SPL 310
Fairlady.

Stephen Webber

On Sat, Nov 19, 2022 at 11:16 AM Pat Horne via Datsun-roadsters <
datsun-roadsters at autox.team.net <mailto:datsun-roadsters at autox.team.net> > wrote:

> Dan, I just looked but didn?t see one on 311s.org <http://311s.org>  but I thought there was
> one there. Don?t know what year though. There may be one in the owner?s
> manual, also on that site.
>
> Peace,
> Pat
>
> Pat Horne
> We support Habitat for Humanity
>
>
> On Nov 19, 2022, at 10:56 AM, Dan Heinze via Datsun-roadsters <
> datsun-roadsters at autox.team.net <mailto:datsun-roadsters at autox.team.net> > wrote:
>
> ?
>
> I?m working on repairs for my 1968 2000 radio (Toshiba 7CN-15T 12V
> negative ground ? 7 Transistor ? Tokyo Shibaura Electric Co, Ltd).
>
> Does anyone have a schematic for this.
>
> The components are so tightly spaced that reading the values on all the
> capacitors is really hard.
>
> Thanks / Dan
>
> ?68 2000 Solex
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