Printing a mount for a red cartridge

[hunty3000]

Split from this thread: https://www.vintage-radio.net/forum/...d.php?t=162107

Thanks for that. I have already replaced the rectifier and replaced the cartridge for one of those chinese ones from ebay as the original one was broken and are very expensive. I just 3d printed a bracket for it and fitted some new crimps. The player sounds great, better than I expected. Also the tweeter works.

[John10b]

Well done on making your own bracket for the Cartridge, how difficult was that to make?
John

[hunty3000]

It was very easy. Took me about a hour start to finish. I do alot a 3d printing at work so I'm used to doing it.

[AD360 Rob]

Excellent job on the 3D printed bracket. Would you be interested in making more of these? I'm sure a few forum members (myself included) would be up for buying some .

Cheers
Rob

[John10b]

I would also be interested in obtaining a few if possible.
John

[hunty3000]

I can upload the 3D file if you want so you can print out your own.

[John10b]

Thank you for the offer but I wouldn’t have a clue how to do it, perhaps others may take up your offer. The Red Chinese Cartridges that I’ve seen on Amazon don’t come with the offer of a bracket I managed to use an old bracket that I had in my “odds and sods” draw.
John

[Cobaltblue]

Originally Posted by hunty3000

I can upload the 3D file if you want so you can print out your own.

Hi Hunty I would like to take you up on your kind offer we have several 3D printers in the office now time I had a go!

The one I was thinking of using is an Utimaker S5 pro apparently

I am sure we are about to get aquainted!

Cheers

Mike T

[Techman]

While what the OP has done is certainly very good, I should point out a potential problem before everyone dashes out and starts printing these off. The angle of the cartridge seems to be incorrect with regards to how it would be to the surface the record. I'm surprised that the back end of the cartridge doesn't drag on the record surface, which it probably will with a stack of eight records on the platter of an autochanger. If using the OP's design it may be necessary to make a wedge shaped spacer to angle the front of the cartridge downwards by a certain amount, remembering that this additional 'wedge' will add more mass to the pickup head and therefore the tracking weight will definitely need adjusting to compensate.

Below are shown pictures of firstly an original Chinese cartridge complete with its 'clip', and secondly the OP's Chinese cartridge with its 'made clip' - you can clearly see the difference. It could well be that the Chinese original clip is too much the other way in practice and needs adjustment to get the angle correct, I don't know - some experimentation may be required.

[John10b]

It would be nice to be able to get some brackets made, if any one could make perhaps two I would like to purchase them.
John

[hunty3000]

I designed this to be in the exact position from the original 8ta cartridge. The metal bracket on the picture is from the player so this is designed to fit that. It's perfectly fine on my player as its in the same position but don't know what it would be like on any other. Carnt see why it wouldn't fit a standard fitting. Isn't the one you are showing a fitting for a modern turntable.

[hunty3000]

John i wouldn't know what to charge for a bracket to be honest. I need to speed knob for a dansette major if you wanted to trade for some if you have any.

[Techman]

Originally Posted by hunty3000

It's perfectly fine on my player

As I said, will the back end of the cartridge clear the top record on a stack of eight 45 singles on the turntable?

Your Bush player is fitted with an autochanger, so it should be able to play up to eight records. If the back of the cartridge touches the surface of the top record in a stack of eight while it's playing then it's at the wrong angle, so easy enough to check.

Assuming that the Chinese cartridge clip is correct, you can clearly see that the bottom flat part of the red stylus assembly is exactly parallel to the top surface of the mounting clip so as to keep the stylus at the correct angle. You may not be able to use the old Sonotone cartridge as a comparison as it's the angle of the stylus tip that matters rather than the cartridge which may be designed differently.

However, having said all of the above, the angle of the stylus on something like an autochanger that isn't regarded as 'audiophile' or 'Hi-Fi', isn't regarded as important by the deck manufacturers, as this angle changes as each record drops onto the platter and the stack gets higher, so if it still plays without the body of the cartridge touching the record when the eighth one has dropped, then it should be near enough not to worry too much about it.

I use the cheap Chinese cartridges and I've never bought one with a clip as they're too expensive and I always make up an adapter and use spacers, wedges and packing pieces to get the angle correct.

Your clip that you've made will be fine just the way it is in most players, because a wedge shaped spacer can always be used to correct the stylus/cartridge angle if need be. The icing on the cake would be to make another clip with the same proportions as the original Chinese example.

Your clips are good and I wouldn't hesitate to use one myself, possibly with packing or a wedge to adjust the angle if I needed to for a particular tone arm or pickup head.

[hunty3000]

Attached are the 3d files for the mount if anyone wants to use them. I have put a angle on it now and it does look better. I've also made it a two piece mount that slots together so it's easy to swop cartridges if needed. There is also a flat mounting plate. I used this on my bush srp31 so the cartridge sits inside the shell more. I've also tried this mount on a bsr ua8 deck and it fits perfectly in the shell without the plate. The photo attached is it mounted inside my bush srp31.
People who haven't got access to 3d printer there are lots of websites that will print it for you. Just upload the files. It's relatively cheap.

[John10b]

Thanks for the info, if any one decides to make some I’ll be interested in purchasing a couple.
John

[phildil]

I'll happily 3d print these parts (and other parts - knobs, widgets etc) for a small fee to cover setup and costs. Drop me a line via PM if interested.

cheers
phil

[Electronpusher0]

PM sent

Peter

[John10b]

Pm sent
John

[DonaldStott]

PM sent

Which of these cheapo Chinese cartridges are recommended?

[Audio1950]

PM sent

Barry