Testing of the Batchelder - Grampian replica

Anything goes! Inventors! Artists! Cutting edge solutions to old problems. But also non-commercial usage of record cutting. Cost- effective, cost-ineffective, nutso, brilliant, terribly fabulous and sometimes fabulously terrible ideas.

Moderators: piaptk, tragwag, Steve E., Aussie0zborn

User avatar
EpicenterBryan
Posts: 738
Joined: Sun Aug 10, 2014 9:01 pm
Location: Eugene, OR USA

Re: Testing of the Batchelder - Grampian replica

Post: # 39800Unread post EpicenterBryan
Mon Jan 18, 2016 12:16 pm


User avatar
dubcutter89
Posts: 359
Joined: Thu Oct 19, 2006 6:30 am
Location: between the grooves..

Re: Testing of the Batchelder - Grampian replica

Post: # 39802Unread post dubcutter89
Mon Jan 18, 2016 12:26 pm

Link works - Sounds good!
Wanted: ANYTHING ORTOFON related to cutting...thx

User avatar
Sillitoe
Posts: 421
Joined: Wed Apr 30, 2014 8:30 pm

Re: Testing of the Batchelder - Grampian replica

Post: # 39803Unread post Sillitoe
Mon Jan 18, 2016 12:31 pm

Real nice!!!

User avatar
EpicenterBryan
Posts: 738
Joined: Sun Aug 10, 2014 9:01 pm
Location: Eugene, OR USA

Re: Testing of the Batchelder - Grampian replica

Post: # 39806Unread post EpicenterBryan
Mon Jan 18, 2016 12:59 pm

dubcutter89 wrote:
In theory the best coil for a moving iron head has lowest possible resistance and max. inductance! Together with a very high resonance this should make a head that is flat vs velocity - that is what you normally want..
From what I understand the shape of the first coil as not quite the same as the stock Grampian coil. I have not seen either coil, but if you look at the shape from the picture below (the head is actually upside down), you see the coil turns 90 degrees on each end and humps over the torsion rods. If the humps are taller that the original, some total length of wire is lost going up and down on each end. So you end up loosing that distance x 4 worth of wire for each coil. Also if the coil hump is wider the same is true about length loss. Which means you don't have the same number of coils.
coil configuration.jpg
dubcutter89 wrote: The numbers for version 2 would be interesting!
Yes, I should have posted that.
1khz test cut:
4.456V
367.2ma
-10db on my Phase Linear 400 power amp.

This resulted in a cut that was about 1dB hotter than the STR100 test reference.

Bryan
You do not have the required permissions to view the files attached to this post.

User avatar
ROLANDJAYS
Posts: 287
Joined: Sun Apr 14, 2013 3:48 am

Re: Testing of the Batchelder - Grampian replica

Post: # 39809Unread post ROLANDJAYS
Mon Jan 18, 2016 1:34 pm

Well now that the link is working to the 2nd cut .
I would like people's opinion on comparing it to the original grampian , presto , audax and any other mono heads .
Do you think it is better ? Not as good ? Equal? Ect ....
If you got a record from me would you be satisfied with the results ?

User avatar
EpicenterBryan
Posts: 738
Joined: Sun Aug 10, 2014 9:01 pm
Location: Eugene, OR USA

Re: Testing of the Batchelder - Grampian replica

Post: # 39810Unread post EpicenterBryan
Mon Jan 18, 2016 1:49 pm

ROLANDJAYS wrote:Do you think it is better ? Not as good ? Equal? Ect ....
If you got a record from me would you be satisfied with the results ?
I also want to point out that the 7.5Khz bump may be able to be toned down with thicker dampening fluid as Mark noted. Or a touch of EQ could be applied. All in all though it's pretty damn good!

Bryan

User avatar
Sillitoe
Posts: 421
Joined: Wed Apr 30, 2014 8:30 pm

Re: Testing of the Batchelder - Grampian replica

Post: # 39812Unread post Sillitoe
Mon Jan 18, 2016 5:55 pm

ROLANDJAYS wrote:Well now that the link is working to the 2nd cut .
I would like people's opinion on comparing it to the original grampian , presto , audax and any other mono heads .
Do you think it is better ? Not as good ? Equal? Ect ....
If you got a record from me would you be satisfied with the results ?
Hi ROLANDJAYS,

I think you've done an amazing job! (great work to Bryan and Mark too).
I would be satisfied with those results.
I don't have a Grampian or other mono head.
Do you have an idea of when these will be available?

Cheers
James

User avatar
ROLANDJAYS
Posts: 287
Joined: Sun Apr 14, 2013 3:48 am

Re: Testing of the Batchelder - Grampian replica

Post: # 39814Unread post ROLANDJAYS
Mon Jan 18, 2016 8:47 pm

before I forget , id like to thank
len , bryan , markrob, kris , mike , and anybody who has ever posted anything about the Grampian head, because I used it for my project.

now heads are ready , I just need to put them together. which doesn't take long , a few days per one.
with this new material the price is going up.
to give you an idea , the cost of this material is 50$ per pound at a 50 pound minimum .
contact me for details if your serious.
and if you get one , test it as soon as you can, don't wait 3 months and then call me . if your not going to use it right away , I would suggest waiting.
there not going anywhere.
thanks

User avatar
dimi751
Posts: 266
Joined: Fri Sep 07, 2012 9:24 pm

Re: Testing of the Batchelder - Grampian replica

Post: # 39816Unread post dimi751
Mon Jan 18, 2016 9:12 pm

Nice work to all sounds great !

User avatar
crowesBR
Posts: 93
Joined: Mon Apr 11, 2016 7:17 pm
Location: San Francisco, CA
Contact:

Re: Testing of the Batchelder - Grampian replica

Post: # 42220Unread post crowesBR
Fri Apr 29, 2016 9:12 pm

How this turns out?

Production already?

Would love to hear more.

User avatar
ROLANDJAYS
Posts: 287
Joined: Sun Apr 14, 2013 3:48 am

Re: Testing of the Batchelder - Grampian replica

Post: # 42232Unread post ROLANDJAYS
Sat Apr 30, 2016 5:09 pm

not in production , but i have some for sale .
pm me for more details.

User avatar
rsimms3
Posts: 427
Joined: Thu Mar 14, 2013 10:01 am

Re: Testing of the Batchelder - Grampian replica

Post: # 42240Unread post rsimms3
Sat Apr 30, 2016 10:28 pm

I'll just drop this in here since there was previous discussion about resizing a long shank to a short shank for the Grampians....what is the length of the shank on a short and long stylus? I have some used NOS in both short/long shanks, but have no idea the actual length that should be used in the Grampian as I've never purchased a new one. I have a Grampian Type C I'm getting ready to mount.

User avatar
markrob
Posts: 1623
Joined: Wed Nov 28, 2007 1:14 am
Location: Philadelphia Area

Re: Testing of the Batchelder - Grampian replica

Post: # 42248Unread post markrob
Sun May 01, 2016 9:39 am

Hi,

In the Presto 1D manual, the stylus length is called out as 47/64" +/- 1/64"

The Grampian manual indicated 5/8" No tolerance given.

I'm not sure if these are the current dimensions that Apollo uses, but it should be close.

Mark

User avatar
rsimms3
Posts: 427
Joined: Thu Mar 14, 2013 10:01 am

Re: Testing of the Batchelder - Grampian replica

Post: # 42251Unread post rsimms3
Sun May 01, 2016 12:57 pm

markrob wrote:Hi,

In the Presto 1D manual, the stylus length is called out as 47/64" +/- 1/64"

The Grampian manual indicated 5/8" No tolerance given.

I'm not sure if these are the current dimensions that Apollo uses, but it should be close.

Mark
These lengths are overall, correct? I have a couple used ones that have been resharpened, that's why I was wondering about just the shank but will take these measurements to see what is close to use in the Grampian for testing. Thanks!

User avatar
Gridlock
Posts: 286
Joined: Tue Jun 21, 2011 6:41 pm
Location: eugene oregon

Re: Testing of the Batchelder - Grampian replica

Post: # 42917Unread post Gridlock
Wed Jun 08, 2016 5:26 am

Just wanted to put this topic back in circulation. I visited epicenterbryans shop and got a close look at the thing. Never seen a grampian in person before but my first thought was holy cow is that thing itty bitty or what? Dude put in some serious work on that thing. Buy one and support this guy!
<\\\\\\\\\\\\\\\\\\\\\[[[[[[[\/]]]]]]]\\\\\\\\\\\\\\\\\>
Recordette Sr.......Presto K-8

Post Reply