Magnavox D8443 tape belt

[MesaAZGuy]

Anyone know of a place to get a belt for the Magnavox D8443? I have had this radio on my bench for over a year and need to get it back together. I replaced the defunct/deteriorated gear and put in new speakers for aesthetics. Any help is greatly appreciated. I want to put the GPO Brooklyn box on the table for a battery vasectomy. The thing kills the battery after a few days of sitting unused. A switch on the front panel to match the rest would do the trick in disconnecting said battery.

 

[goodman]

I want to put the GPO Brooklyn box on the table for a battery vasectomy.
The thing kills the battery after a few days of sitting unused.
A switch on the front panel to match the rest would do the trick in disconnecting said battery.

Last year I saw video on Youtube about this problem.
You can switch off the boombox, but the VU meteres still on by default.
When you knock on front panel you must see that VU meters still work!

GPO Boombox problems
----

 

[hand123]

Anyone know of a place to get a belt for the Magnavox D8443? I have had this radio on my bench for over a year and need to get it back together. I replaced the defunct/deteriorated gear and put in new speakers for aesthetics. Any help is greatly appreciated. I want to put the GPO Brooklyn box on the table for a battery vasectomy. The thing kills the battery after a few days of sitting unused. A switch on the front panel to match the rest would do the trick in disconnecting said battery.

I'm taking my broken D8443 apart and modifying it. If I can figure out how to take the cassette portion apart, I can mail you the belt. Could you post a picture indicating what screws to remove to disposable the cassette portion?

 

[playab0yyy]

Anyone know of a place to get a belt for the Magnavox D8443? I have had this radio on my bench for over a year and need to get it back together. I replaced the defunct/deteriorated gear and put in new speakers for aesthetics. Any help is greatly appreciated. I want to put the GPO Brooklyn box on the table for a battery vasectomy. The thing kills the battery after a few days of sitting unused. A switch on the front panel to match the rest would do the trick in disconnecting said battery.

Did you ever find a source for belts? Also, what speakers did you put in and were they a straight drop-in, or did you have to alter the case to make them fit?

 

[caution]

SCY5.2 and SCQ10.0.
SBO5.2 and SBM10.0 also work.
1425-88 and 1425-12 also work (EVG)
Finding belt sizes can be tedious. Here's the steps I took in case it helps others.

Page 41 of this list says the counter belt is SCY5.2, which according to the table on page 278 has a cross-section of 0.035" x 0.035" (0.9mm x 0.9mm).

The drive belt wasn't listed, so I had to try to cross-reference with the part number. The RT-1 Deck SM listed it as 4H-358-30194.
Trying some other options, I went to this page and clicked on "PRB Line PDF Catalogue" which has some more links.
I clicked on "EVG Belts & Wheels Catalogue" and got a pulldown menu, where I clicked on the link for "Audio Cassette - Car Stereo - Turn Table Belts" which lists 4H35830194 on page 29 as "1425-12"
I cross-referenced that EVG belt number by using the other link on the list called "Square Belts Specifications" which lists it as 10.0" with a cross-section of 0.055" x 0.055" (1.4mm x 1.4mm).
According to the PRB table on page 278 (at the link above), SCQ10.0 has a cross-section of 0.052" x 0.053", which is likely the correct PRB code for this belt. The closest size in the newer system is SBM10.0, since "Small Belt Medium" has a cross-section of 1.6 x 1.6mm (0.063" x 0.063") which is a tad thicker but will work fine.

I double-checked the counter belt, because that first list is notorious for being wrong. I cross-referenced the part number from the SM, which lists 4H-358-30201. Turntableneedles has it listed as SBO5.2. That would make sense because SBO belts have a cross section of 0.039" x 0.039" (1mm x 1mm) which will work just as well as 0.9mm. If you look at page 278 at the list above, you'll see a wide range of cross sections for the old PRB codes. The new codes for square belts only have seven cross sections. Finally, looking at the "Square Belt Specifications" link above for EVG belts, it lists 1425-88 for the same length and cross-section as SCY5.2.

I noticed that there's also a Philips version of the SM with the deck SM included at the end. It uses 4822 instead of 4H as the part number prefixes, but unfortunately it didn't make it any easier to find the belt code. Sometimes it does.

I noticed trippy1313 replaced his D8443 belts with SBO7.2 instead of SBO5.2, and SBS9.5 instead of SBM10.0. I have no idea where he got those values, and why such a loose counter belt worked okay.

 

[playab0yyy]

SCY5.2 and SCQ10.0.
SBO5.2 and SBM10.0 also work.
1425-88 and 1425-12 also work (EVG)
Finding belt sizes can be tedious. Here's the steps I took in case it helps others.

Page 41 of this list says the counter belt is SCY5.2, which according to the table on page 278 has a cross-section of 0.035" x 0.035" (0.9mm x 0.9mm).

The drive belt wasn't listed, so I had to try to cross-reference with the part number. The RT-1 Deck SM listed it as 4H-358-30194.
Trying some other options, I went to this page and clicked on "PRB Line PDF Catalogue" which has some more links.
I clicked on "EVG Belts & Wheels Catalogue" and got a pulldown menu, where I clicked on the link for "Audio Cassette - Car Stereo - Turn Table Belts" which lists 4H35830194 on page 29 as "1425-12"
I cross-referenced that EVG belt number by using the other link on the list called "Square Belts Specifications" which lists it as 10.0" with a cross-section of 0.055" x 0.055" (1.4mm x 1.4mm).
According to the PRB table on page 278 (at the link above), SCQ10.0 has a cross-section of 0.052" x 0.053", which is likely the correct PRB code for this belt. The closest size in the newer system is SBM10.0, since "Small Belt Medium" has a cross-section of 1.6 x 1.6mm (0.063" x 0.063") which is a tad thicker but will work fine.

I double-checked the counter belt, because that first list is notorious for being wrong. I cross-referenced the part number from the SM, which lists 4H-358-30201. Turntableneedles has it listed as SBO5.2. That would make sense because SBO belts have a cross section of 0.039" x 0.039" (1mm x 1mm) which will work just as well as 0.9mm. If you look at page 278 at the list above, you'll see a wide range of cross sections for the old PRB codes. The new codes for square belts only have seven cross sections. Finally, looking at the "Square Belt Specifications" link above for EVG belts, it lists 1425-88 for the same length and cross-section as SCY5.2.

I noticed that there's also a Philips version of the SM with the deck SM included at the end. It uses 4822 instead of 4H as the part number prefixes, but unfortunately it didn't make it any easier to find the belt code. Sometimes it does.

I noticed trippy1313 replaced his D8443 belts with SBO7.2 instead of SBO5.2, and SBS9.5 instead of SBM10.0. I have no idea where he got those values, and why such a loose counter belt worked okay.

Apparently they worked for Trippy and for 80sKidWannabe (https://boomboxery.com/forum/threads/fixing-my-d8443.31948/post-391071). Because of their apparent success, I just ordered the 9.5 x .046 and 7.2 x .034 from Turntableneedles. Hopefully, they'll work!