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Barry
20-10-2011, 23:05
Today has not been a good day at all! As some of you might know I am undertaking a programme of revisiting some ‘classic’ cartridges (both fixed and moving coil designs) and comparing their performance with my current favourite cartridges: the Decca, the EMT and Denon designs.

As part of this exercise I was loaned a cartridge by my friend Dave (known on the forum as DaveM), a Grace F-14/BR/MR. I was very keen to hear this design, as I knew of the F-9E and F-11 cartridges. Indeed I thought this design might be a ‘sleeper’.

Dave hadn’t used the cartridge for a few years since moving to the Goldring Elite mc design; it had lain in its box since then.

Now I like to pride myself that I can install cartridges into headshells with impunity: indeed I have probably done so to some twenty or more cartridges over my hi-fi ‘career’. However it was a loan item, so I though I should be especially prudent and being a fixed coil design, remove the stylus/cantilever assembly from the cartridge before fitting the cartridge body into a spare headshell.

Big mistake! – For whatever reasons the shaft of the cantilever assembly, which is 7mm long (very long compared to those of ADC designs, but short compared to the 12mm of Shure designs) had become stuck. The surrounding plastic cantilever shroud seemed to be made of a quite brittle plastic, or it had become brittle with age, with the result that it broke away from the stub of the cantilever assembly, leaving an exposed and vulnerable cantilever some 4mm long. Nonetheless I was able to fit the cartridge into an SME S2 shell and complete the connections. The entire assembly was then put back into the expanded polystyrene box of the SME shell until such time as it was to be set up in the arm. I have used ‘nude’ cartridges before (one of my EMT cartridges is such) and have used other designs having long and vulnerable cantilevers (such as the Sumiko ‘Blue Point Special’), so I knew that I could at least use the Grace in its present state.

Today I thought I would set it up, but before that I wanted to photograph the cartridge/headshell combination for my eventual report. I’m not sure exactly what happened but in removing it from the polystyrene nest, I must have caught the cantilever and being made of boron it snapped! Had the cantilever been made of aluminium it would have bent, but it might have been possible to straighten it if not too badly bent. Worse still I cannot remove the remains of the shaft. I have tried using tweezers and needle-nose pliers, but to no avail. This is especially maddening as Dave also supplied me with a spare stylus for the Grace F-9E, which might have fitted the F-14.

So you can imagine I’m not a happy bunny at all and am feeling quite contrite. I should say that Dave is remarkably stoical about his cartridge’s misfortune but it has as the title of this thread says: “thoroughly pissed me off”. :steam::steam::steam:

The Grand Wazoo
20-10-2011, 23:35
That sounds like a bit of a disastrous day for you Barry. However, it's nice to see you back. Have you thought of applying a tiny bit of heat in the appropriate place to remove the snapped off stub?
I'm not sure where or how much, but it could work, I'd have thought?

Dominic Harper
20-10-2011, 23:45
You could always send it my way to see what can be done?

MartinT
21-10-2011, 04:27
Or possibly a spell in the freezer if the expansion goes the other way?

Marco
21-10-2011, 06:22
Oops.... That is a bit of a nightmare, mate! I was looking forward to finding out what you thought the Grace sounded like, and I guess so were you! :doh:

Still, these things happen, and at least Dave's ok about it :)

Hopefully you'll be able to remove the remains of the shaft and manage to fit the stylus for the Grace F-9E instead, and all will not be lost! Keep us posted :cool:

Marco.

John
21-10-2011, 06:57
Sorry to hear about such a bad day

DSJR
21-10-2011, 07:49
Oh, the times I've done just that.....:(

If the cantilever break is a clean one, it may be possible to splice the two halves together.

Spectral Morn
21-10-2011, 09:20
Nice to see you back Barry but sorry to hear of your problem.

Regards D S D L

Barry
21-10-2011, 15:21
Hi Guys,

Thanks for the sympathy and suggestions. I’m still kicking myself over my clumsiness: if only I had left the assembly ‘as is’ on a shelf and not put it away in a box. I would be spitting feathers had it been my own cartridge, but having had it loaned to me I was beside myself with anger, especially as the cartridge cost ~ £1000 back in the eighties!

Writing my ‘confession’ was sort of cathartic for me. Anyway some positive news that partially ameliorates the situation: I have managed to remove the remnants of the stylus/cantilever tube. I did try heating up the cartridge body with a hairdryer (more gentle than a hot air gun), but this was not effective. The problem was there was not enough of the tube protruding from the cartridge body, to get any purchase with tweezers or needle nosed pliers. In the end, thinking I had nothing to loose, I used a miniature gimlet (?) screwed into the open end of the tube and continued to twist as I pulled. This, despite the tight fit, proved successful.

Dominic thanks for your offer of help. I thought of you after I had posted: “I’m sure there’s a member ‘up north’ who does cartridge repairs”. If it is of any interest, here is a photo of the remnants of the stylus assembly.

http://i780.photobucket.com/albums/yy88/barrydhunt/004-3.jpg

Top left: cantilever tube, centre: brass plug at the end of the tube, right: gimlet used to remove tube.
Lower left: fragment of the broken boron cantilever, right: magnet (neodymium?)

Having removed the cantilever tube, I could now try and fit the replacement stylus for the F9E. Being mindful of the possibility that it too might be a tight fit, which could ultimately seize, with Dave’s permission, I applied a very small amount of WD 40 to the cantilever tube before insertion into the cartridge body. Every thing seems to have fitted properly as the following photos show.

http://i780.photobucket.com/albums/yy88/barrydhunt/001-8.jpg

http://i780.photobucket.com/albums/yy88/barrydhunt/003-6.jpg

http://i780.photobucket.com/albums/yy88/barrydhunt/002-7.jpg

There is a dearth of information on the Grace F-14, and I have absolutely no idea of its specification. There is some on the Grace F9E:

Output into 47KΩ (at 5cm/s ?): 3.5mV
Response: 10Hz –45KHz
Suggested VTF: 1.2g
Compliance: 12cu
Balance: < 1dB
Separation: >28dB
Stylus: 0.2 x 0.8 mil elliptical
Cantilever: “low mass alloy”.

How fitting the F9E stylus into the F-14 body will alter the performance, is anybody’s guess.

Watch this space …….

MartinT
21-10-2011, 16:55
Well done, Barry.

Those bolts look a tad long?

Jac Hawk
22-10-2011, 10:34
Well done Barry you got there in the end

DSJR
22-10-2011, 11:13
Did you put some black-tac between top of cartridge and headshell? It makes a heck of a difference I found, even with high compliance mm types. Closes the gaps in the old headshells between cartridge top and headshell proper..

pcourtney
03-12-2016, 22:49
you could get the F14 in the following cantivers, from the most expensive sapphire down to the aluminium :

F-14 SAP, Sapphire cantilever
F-14 RC some sort of rare ceramic cantilever
F-14 BE Beryllium Cantilever
F-14 Ruby Ruby Cantilever
F-14 BR Boron Cantilever
F- 4 AL Aluminum Cantilever


NB it seems that they all used a 0.2 x 0.8 mil super elliptical tip except the F-14 BR which you had !

http://www.adventuresinhifiaudio.com/13/07/2012/living-with-a-chimera-the-grace-f-14brmr-cartridge/

a nice ruby one - drool :-)

http://i1257.photobucket.com/albums/ii517/pcourtney11/Grace%20F-14%20Ruby_zpsjbbfz28a.png