thuchan
you should find the screws here:
http://www.spaenaur.com/
don |
i have been speaking with chris about this thread. he had seen pics of my armpod. you guys are very passonite about this. that's great to see.
my design requirements were to have adjust-ability for azimuth, vta (sra) and flexibility for different arms. the pics show a breuer, but i have already replaced that with a davinci.
i have mounted arms to the armpod that have the wiring come through the pivot point and out the bottom, so a surface mount would not work. i had to use an armboard mounted on a post, on the armpod, to offset the arm. this allows the wiring to exit through the bottom.
pics here:
http://www.canuckaudiomart.com/view_userimages.php?user_id=600
and here :
http://cgim.audiogon.com/cgi-bin/vs.pl?vaslt&1245187375&viewitem&o5
don |
halcro, the vta is adjusted using the micrometer ath the top of the post, there is a thumbscrew on the side that you would loosen first, adjust the height and then retighten the screw to lock everything solid. the micrometer has a long rod attached to it that extends to the bottom of the pod. this enables the 1" shaft to be raised and lowered as required.
lewm, i use the 3 thumbscrews at the bottom to adjust for azimuth. it doesn't matter how the armboardor pod ultimately seats, level or not, the azimuth is measured at the stylus using a fozgometer.
don |
kbell
the spikes are stock brass thumbscrews from spaenaur and they were turned to a point on a lathe,
the wiring on my breuer and on my davinci are both stock, no mods there. |
lewm
you are correct in your assessment of the positioning of the adjustment screws. it is not a perfect adjustment, but it is better than nothing, which is what most arms have, nothing.
i have mounted the breuer directly on the raven via an armboard, on the back of the table now. i have installed 3 thumbscrews in the armboard where it meets the plinth in order to get some azimuth adjustment. i mounted a van den hul colibri on the breuer and am having a heck of a time getting the azimuth good. i think i need another armpod!
as far as your second statement, i really don't know why isolation is a better sound, removing resonance was an educated guess. something changed for the better, whatever it is. |
thuchan
the screws can be 140mm long. if you counterbore the 5 holes in the bottom to fit the screw heads to a depth of appx 3/8" that will allow 3/8" penetration into the sp10 thread sockets, which is more than enough. c/b the holes to allow for a washer as well, so 3/8 deep x 3/4 to 1" dia. should work fine.
don |
hi guys, it's been a few months. lot's has changed. i have installed a new rack for my system and, the reason for the post, i have made a new armpod.
i am having another stainless pod being made, but my machinist buddy is very busy. so, i decided to make on using panzerholtz. you can see a pic on my virtual system, on the micro seiki rx1500.
sonically, the armpod is doing what is expected. i have great isolation of course, which improves greatly on the image, detail, focus and bass response. the only issue that i have with it is the weight. it is on the light side, compared to stainless or brass. it can move relatively easily. so when i adjust the tracking force, for instance, i have to be carefull not to re-locate the pod when i'm adjusting the counterweight on the arm.
otherwise, i'd recommend using panzerholtz. it can be turned on a wood lathe without special tooling. i do have a small metal lathe that i used, but for the average guy, it id workable. |
brad
i only have assembled pics. is there anything specific that you need to know?
also, thanks for the idea of weighting the panzerholz pod. for now, i am using it as-is since i do have another stainless pod half made. it will not have the micrometer in it as the first one does. |
brad
the brass sleeve on the stainless shaft is just a spacer. it was easier to machine. i needed 1.18". machining 1.5" stainless would have been more difficult on the small lathe. so i chose to keep the shaft and mating hole at 1" and machine a sleeve using brass to bring the dia up to size.
i do not have any pics of it through the assembly. that would have been a good idea!
the shaft raises with the micrometer as it extends and lowers with gravity, when the micrometer is retracted. there is a light layer of grease between the shaft and it's mating hole in the base.
i could send you closer pics if you would like. |
brad
the mic is set into a counter-bored hole in the top of the shaft and held with a small set-screw from the back.
there are many different mic heads available. just check out the starret website to find one that suits your application. they are appx $80.
don |
brad, you are correct in the 3" dia and 3" height. it's solid stainless and it is heavy. you're also correct in the amount of thought required with the design. i spent lots of time at that stage before the machining started. all of my plans were on scraps of paper and napkins! the emachine drawing is a definite asset.
henry, your observation about the cantilevering is a correct one. the only issue that i have with that is my armboard. the vertical shaft is solid 1" stainless. i can understand the extension within the arm itself making a sonic difference, since it's really only a relatively thin-walled tube supporting the whole arm. mine is set down, bottoming out and i let the 1" shaft provide the height adjustments. the reason that my armboard is so long is that i wasn't sure how much clearance that i would need for the grandezza as it swings past the micrometer. it turns out that i have a good 1" plus clearance, so i will make a new armboard, shorter and thicker at the shaft end for more contact area. i am happy with it now and don't want to break the set-up, but i will in the very near future.
thanks for the comments. it's still a learning experience.
don |
in-shore, halcro is correct in the 3 points he makes. my mandate when i designed the pod was to have as much adjust-ability on-the-fly as possible. i can adjust azimuth and sra on-the-fly. i also wanted to standardise on armboards, as i have a micro seiki table as well with a number of armboards and arms.
i have done all of that with my pod.
as mentioned in an earlier post, the only concern that i have is my extended cantilevered armboard for the davincci. i will be making a new board, shorter and thicker at the post end for more contact area and less overall flex.
i have another pod, similar to the the one pictured, almost completed. it will not have the adjustable sra, but thr rest is the same. it's for my second table. i'm looking forward to installing my moerch up4 on it.
i'll post pics when it's done.
don |
my thoughts on airborne feedback. i believe it to be real, but difficult to identify. what i did to minimize it was to minimize the surface areas that could absorb airborne vibrations/waves. i did this by building a "nude" rack. i eliminated side panels and shelves and rest my equipment on the frame itself. i also incorporate alto extremo feet to absorb and isolate.
for the equipment, such as tables, that would not fit onto a nude rack, i made isolation platforms for them, filled with dense steel shot. that way, any airborne waves would have a hard time moving the heavy weight.
i have to update the pics in my gallery (actually, i thought that i had done that!!).
don |
