Group purchase of EPCOS B25839 MKV caps and TT maxon motors

harvardian · 23rd August 2002, 10:48 AM

Hi,

Bernhard has offered to get some of these caps and send them off. In order to save on shipping, I will handle the shipping out to the US/Canada. It should cost less about $10.00 each plus $3.00 shipping (padded bag $1.75 plus postage). Easiest way to pay is by paypal. I'd like to have all orders by next Friday.

So far, it looks like the 1uF/900V (600V?) is the cap of choice.

Best Regards,

Dale Herman
dherman@ksaria.com (Paypal and email)

dice45 · 23rd August 2002, 10:59 AM

### This is the order list ###
Status Wed 10/30/02, 14:10 CEST

All,
where to get Siemens/Epcos MKV B25839 capacitors ?
where to get a decent maxon motor and a pulley for it?
Well, i have agreed to supply both at my cost. Please email me privately for your orders.

I get the maxon motor at our local surplus store; the motor will cost US$10 including any work i have on it e.g. for removing the gear wheel from the shaft without damage or glueing on the pulley.
I haven't got the prices for pulley yet.

Shipping from Germany is expensive; i recommend small package uninsured for $8 surface or $20 airmail. Insured parcel can go up to US$55 if airmail and priority is chosen.

This post is my bulletin board for collected orders. I will announce who has ordered and which quantity.

Consider folks, the 1µ is 20.5mm dia x 75mm length, the 0µ47 has same dia and 44mm length.

MKV:
B25839:
1µ0 / 700V:
dice45: 20x
RichardJones: 4x
setriode: 4x
PeterDaniel: 20x
kasra: 2x
Petter: 20x
GaryB: 8x
harvardian: 8x
AKSA: 4x
wiligruen: 20x

0µ47 / 700V ac:
dice45: 24x
setriode: 4x
peterr: 6x
GaryB: 8x
harvardian: 8x
AKSA: 4x

0µ33 / 700V ac:
dice45: 8x
setriode: 2x
Peterr :2x

0µ22 / 700V ac:
dice45: 6x

0µ1 / 700V ac:
dice45: 10x

order closed for all MKV and order placed today. I take all quantiies for granted. Within the next 12 hours i may be able to still increase ordered numbers, i.e. to accept additional orders.

maxon 2028.949-61.121-025
(48V for nominal 6440 rpm; the motor is NOS before i remove the gear wheel):
dice45: 5x
peterr: 3x
peted: 2x
Brett: 2x
gilid: 4x
planet10: 2x

maxon 2028.941-61.121-025
(36V for nominal 8850 rpm; the motor is NOS before i remove the gear wheel):
petter: 2x
dhaen: 2x
GaryB: 3x
difool: 2x
buglehead: 2x
infinite baffle: 2x

maxon 2028.945-61.121-025
(18V for nominal 8010 rpm; the motor is NOS before i remove the gear wheel):
pedroPO: 4x

maxon 2028.xxx
(18 or 36 or 48V)
mgreene: 2x

Availablity:
2028.949 (48V/6440rpm): 18x, 0x left
2028.941 (36V/8850rpm): 13x, 0x left
2028.945 (18V/8010rpm): 4x, 0x left
some left, type not guaranteed.

I feel urged to tell you the motor diameter is 28mm, not maxon standard (26 or 29 mm). I recommended to put the commutator end of the motor in an airtight capsule. So this capsule will have dia 28, hinthint, better order one more as spare part, compared to maxon retail price list they are dirt-cheap.

News:
All different motors behave as expected; samples has been tested with success.
orderlist for motors may be still open for a few more; a second lot showed up. But i will not guarantee which one will come, anyhow i will not mix it up with orders already placed.

Pulleys:
dice45: 3 kits
peterr: 1 kit
peted: 2x
Brett: 2x
gilid: (4x)
ultranalog: 4x
petter: 1 kit
planet10: 2x
dhaen: 2x
GaryB: 3x
buglehead: 1 kit
infinite baffle: 1 kit
pedroPO: 1 kit
difool: 2 kits
mgreene: 2 kits
Variac: (no quantity specified)

Pulley:
Effective diameter will be 12 mm. To allow for different shaft diameters and to enable mounting free of brute force and to ensure proper concentric running, i have decided to go with a collet chuck clamping for the pulley. This means: should the motor be faulty, noisy, simply worn, the pulley can be recycled for another motor without damage for both motor and pulley. Pulley will have a collet chuck for 3mm and for 2mm with it.

I am considering to make separate pulleys for flat belt (e.g. magnetic tape) and round belt (big o-ring or string) fitting on the same collet chuck.

the collet chuck solution is what i settle on; I got no objections.

I also settle on separate pulleys for flat belt and round belt; in fact one pulley kit per person should be sufficient, maximum two if some of you want a replacement kit.

Option: pulley with roughened run surface for voicing (some may sonically prefer a smooth and slippery pulley and others a rough and slip-free pulley)

Delivery time depends on the pulley.
I hope to have access to CNC machining for the pulley within 3 weeks from 10/18/02. Sorry, my buddy is behind schedule. I am pushing him everyday but i am not making promises concerning the schedule.

120 Hz Strobe flasher, quartz crystal stabilized, complete with housing:
dice45: 1x
hifidaddy: 1x
peterr: 1x

120 Hz Strobe flasher, kit with perforated PCB:

Still wondering if others than GaryB have read my posts conerning the strobe flasher.

BrianGT · 23rd August 2002, 01:49 PM

What is so special about these capacitors? What kind of capacitors are they?

--
Brian

Peter Daniel · 23rd August 2002, 02:10 PM

Brian,

Check this thread:Anyone Tried Auricaps? They supposedly beat any other cap when it comes to sonics.

Benhard or Dale,

Do they come in values bigger than 1uF?

dice45 · 23rd August 2002, 02:27 PM

Peter,

B25839 come as 0µ1, 0µ22, 0µ47, 0µ68, 1µ and Bürlkin and Epcos specify them "for coupling purposes".
For bigger values you have to parallel them or use B25834, these group to 10µ.

And, do not misspell my name, it is fully sufficient if i do it. Misspelling my name, i mean

Dale,
do you want to handle shipping only or also payment issues (i.e. you place a collected order for all and i charge you total)?

Hey, and let's put a two week schedule on it, it is holiday time.

All,
i have intended to use closed my thread as order announcement. But i did not want to move too much air around our group purchase. I have a bad feeling seeing 3 threads now around the topic and noone know where to look 1st.
Therefore I merge my post/thread now with this thread.

Peter Daniel · 23rd August 2002, 02:39 PM

Quote:

Originally posted by dice45

And, do not misspell my name, it is fully sufficient if i do it. Misspelling my name, i mean

Sorry for a typo, I know how to write it properly.

Do B25834 sound the same as parallelled 39s? Let's say we talk about 2u or 4u values.

dice45 · 23rd August 2002, 03:00 PM

Peter,
i misspell my own name all the time

I haven't tried '34 and '39 in direct comparison, i only know that '34 always were used as top notch coupling caps for larger values. Tube application, 100's of Volts across it. My buddy Peter Hartmann's fabulous 845 SET amp is MKV '34 all over. PS and couling caps oops, there he used some '35.

I once tried one as speaker cap, just fabulous. I already tried the as tubeamp PS caps, best you can get. But i doubt that such a big device can equal the '39, i always found smaller physical size to be preferred sonically, all else conditions being similar.
Parallelling '39 is expensivish but would be my preference. Slight preference.

10µ of MKV '34 is a medium size eggshape hand grenade. Derating is fancily ridiculous. A 33µ /600V MKV slowly started to cook and die at 1600V.

For those wondering what the MKV hype is all about, follow the WIMA MKS vs.MKP thread

cocolino · 23rd August 2002, 08:34 PM

As most of You likely don`t know, I just want to add something not insignificantly for all those looking for the MKV prices at Bürklin:

these prices are without VAT, and our VAT here is 16%.....

RichardJones · 26th August 2002, 12:55 PM

ok,

who am I sending the payment too?

who want's my address?

And finally, any expected delivery date / week?

Thanks!!!

harvardian · 26th August 2002, 01:23 PM

Hi Richard,

As the shipping charges for each individual person in the USA/CA would be around $16.00, I was going to have all USA/CA orders shipped to me and I would re-ship out. The price for the re-shipping would be around $2-3. ea.

Lets assume there are 6 people in the USA/CA interested:

Shipping: 16.00
Re-ship: 6*2.5 = 15.00

Total $30.00/5 = $6.00 each person, savings of $10.00

It may be easiest to send me all of the payments and I will pay Bernhard, thus eliminating the confusion in shipping charges.

Bernhard and I have agreed to wait two weeks before finalizing the order.

Best Regards,

Dale

P.S. Please send all queries on what's available to Bernhard. I am only handling the USA/CA redistribution to save us some money.

23rd August 2002, 10:48 AM	#1
harvardian diyAudio Member Join Date: Dec 2001 Location: Austin, TX	Group purchase of EPCOS B25839 MKV caps? Hi, Bernhard has offered to get some of these caps and send them off. In order to save on shipping, I will handle the shipping out to the US/Canada. It should cost less about $10.00 each plus $3.00 shipping (padded bag $1.75 plus postage). Easiest way to pay is by paypal. I'd like to have all orders by next Friday. So far, it looks like the 1uF/900V (600V?) is the cap of choice. Best Regards, Dale Herman dherman@ksaria.com (Paypal and email) __________________ doing my part to Keep Austin Wierd.

23rd August 2002, 10:59 AM	#2
dice45 diyAudio Member Join Date: Jan 2002 Location: Munich, Bavaria	MKV B25839 & TT maxon motor, orders please! ### This is the order list ### Status Wed 10/30/02, 14:10 CEST All, where to get Siemens/Epcos MKV B25839 capacitors ? where to get a decent maxon motor and a pulley for it? Well, i have agreed to supply both at my cost. Please email me privately for your orders. I get the maxon motor at our local surplus store; the motor will cost US$10 including any work i have on it e.g. for removing the gear wheel from the shaft without damage or glueing on the pulley. I haven't got the prices for pulley yet. Shipping from Germany is expensive; i recommend small package uninsured for $8 surface or $20 airmail. Insured parcel can go up to US$55 if airmail and priority is chosen. This post is my bulletin board for collected orders. I will announce who has ordered and which quantity. Consider folks, the 1µ is 20.5mm dia x 75mm length, the 0µ47 has same dia and 44mm length. MKV: B25839: 1µ0 / 700V: dice45: 20x RichardJones: 4x setriode: 4x PeterDaniel: 20x kasra: 2x Petter: 20x GaryB: 8x harvardian: 8x AKSA: 4x wiligruen: 20x 0µ47 / 700V ac: dice45: 24x setriode: 4x peterr: 6x GaryB: 8x harvardian: 8x AKSA: 4x 0µ33 / 700V ac: dice45: 8x setriode: 2x Peterr :2x 0µ22 / 700V ac: dice45: 6x 0µ1 / 700V ac: dice45: 10x order closed for all MKV and order placed today. I take all quantiies for granted. Within the next 12 hours i may be able to still increase ordered numbers, i.e. to accept additional orders. maxon 2028.949-61.121-025 (48V for nominal 6440 rpm; the motor is NOS before i remove the gear wheel): dice45: 5x peterr: 3x peted: 2x Brett: 2x gilid: 4x planet10: 2x maxon 2028.941-61.121-025 (36V for nominal 8850 rpm; the motor is NOS before i remove the gear wheel): petter: 2x dhaen: 2x GaryB: 3x difool: 2x buglehead: 2x infinite baffle: 2x maxon 2028.945-61.121-025 (18V for nominal 8010 rpm; the motor is NOS before i remove the gear wheel): pedroPO: 4x maxon 2028.xxx (18 or 36 or 48V) mgreene: 2x Availablity: 2028.949 (48V/6440rpm): 18x, 0x left 2028.941 (36V/8850rpm): 13x, 0x left 2028.945 (18V/8010rpm): 4x, 0x left some left, type not guaranteed. I feel urged to tell you the motor diameter is 28mm, not maxon standard (26 or 29 mm). I recommended to put the commutator end of the motor in an airtight capsule. So this capsule will have dia 28, hinthint, better order one more as spare part, compared to maxon retail price list they are dirt-cheap. News: All different motors behave as expected; samples has been tested with success. orderlist for motors may be still open for a few more; a second lot showed up. But i will not guarantee which one will come, anyhow i will not mix it up with orders already placed. Pulleys: dice45: 3 kits peterr: 1 kit peted: 2x Brett: 2x gilid: (4x) ultranalog: 4x petter: 1 kit planet10: 2x dhaen: 2x GaryB: 3x buglehead: 1 kit infinite baffle: 1 kit pedroPO: 1 kit difool: 2 kits mgreene: 2 kits Variac: (no quantity specified) Pulley: Effective diameter will be 12 mm. To allow for different shaft diameters and to enable mounting free of brute force and to ensure proper concentric running, i have decided to go with a collet chuck clamping for the pulley. This means: should the motor be faulty, noisy, simply worn, the pulley can be recycled for another motor without damage for both motor and pulley. Pulley will have a collet chuck for 3mm and for 2mm with it. I am considering to make separate pulleys for flat belt (e.g. magnetic tape) and round belt (big o-ring or string) fitting on the same collet chuck. the collet chuck solution is what i settle on; I got no objections. I also settle on separate pulleys for flat belt and round belt; in fact one pulley kit per person should be sufficient, maximum two if some of you want a replacement kit. Option: pulley with roughened run surface for voicing (some may sonically prefer a smooth and slippery pulley and others a rough and slip-free pulley) Delivery time depends on the pulley. I hope to have access to CNC machining for the pulley within 3 weeks from 10/18/02. Sorry, my buddy is behind schedule. I am pushing him everyday but i am not making promises concerning the schedule. 120 Hz Strobe flasher, quartz crystal stabilized, complete with housing: dice45: 1x hifidaddy: 1x peterr: 1x 120 Hz Strobe flasher, kit with perforated PCB: Still wondering if others than GaryB have read my posts conerning the strobe flasher. __________________ Greets, Bernhard

23rd August 2002, 02:10 PM	#4
Peter Daniel diyAudio Member Join Date: Jul 2002 Location: Toronto, Canada	Brian, Check this thread:Anyone Tried Auricaps? They supposedly beat any other cap when it comes to sonics. Benhard or Dale, Do they come in values bigger than 1uF? __________________ www.audiosector.com “Do something really well. See how much time it takes. It might be a product, a work of art, who knows? Then give it away cheaply, just because you feel that it should not cost so much, even if it took a lot of time and expensive materials to make it.” - JC

23rd August 2002, 02:27 PM	#5
dice45 diyAudio Member Join Date: Jan 2002 Location: Munich, Bavaria	Peter, B25839 come as 0µ1, 0µ22, 0µ47, 0µ68, 1µ and Bürlkin and Epcos specify them "for coupling purposes". For bigger values you have to parallel them or use B25834, these group to 10µ. And, do not misspell my name, it is fully sufficient if i do it. Misspelling my name, i mean Dale, do you want to handle shipping only or also payment issues (i.e. you place a collected order for all and i charge you total)? Hey, and let's put a two week schedule on it, it is holiday time. All, i have intended to use closed my thread as order announcement. But i did not want to move too much air around our group purchase. I have a bad feeling seeing 3 threads now around the topic and noone know where to look 1st. Therefore I merge my post/thread now with this thread. __________________ Greets, Bernhard

23rd August 2002, 03:00 PM	#7
dice45 diyAudio Member Join Date: Jan 2002 Location: Munich, Bavaria	Peter, i misspell my own name all the time I haven't tried '34 and '39 in direct comparison, i only know that '34 always were used as top notch coupling caps for larger values. Tube application, 100's of Volts across it. My buddy Peter Hartmann's fabulous 845 SET amp is MKV '34 all over. PS and couling caps oops, there he used some '35. I once tried one as speaker cap, just fabulous. I already tried the as tubeamp PS caps, best you can get. But i doubt that such a big device can equal the '39, i always found smaller physical size to be preferred sonically, all else conditions being similar. Parallelling '39 is expensivish but would be my preference. Slight preference. 10µ of MKV '34 is a medium size eggshape hand grenade. Derating is fancily ridiculous. A 33µ /600V MKV slowly started to cook and die at 1600V. For those wondering what the MKV hype is all about, follow the WIMA MKS vs.MKP thread __________________ Greets, Bernhard


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23rd August 2002, 01:49 PM	#3
BrianGT diyAudio Moderator Emeritus Join Date: Jan 2002 Location: near Atlanta, GA	What is so special about these capacitors? What kind of capacitors are they? -- Brian

23rd August 2002, 08:34 PM	#8
cocolino diyAudio Member Join Date: May 2002 Location: Bavaria (south of veal sausage equator)	prices at Bürklin As most of You likely don`t know, I just want to add something not insignificantly for all those looking for the MKV prices at Bürklin: these prices are without VAT, and our VAT here is 16%..... __________________ Christoph *STEAL the BEST - INVENT the REST*

26th August 2002, 12:55 PM	#9
RichardJones diyAudio Member Join Date: Jan 2002	payment too? ok, who am I sending the payment too? who want's my address? And finally, any expected delivery date / week? Thanks!!!

26th August 2002, 01:23 PM	#10
harvardian diyAudio Member Join Date: Dec 2001 Location: Austin, TX	Hi Richard, As the shipping charges for each individual person in the USA/CA would be around $16.00, I was going to have all USA/CA orders shipped to me and I would re-ship out. The price for the re-shipping would be around $2-3. ea. Lets assume there are 6 people in the USA/CA interested: Shipping: 16.00 Re-ship: 6*2.5 = 15.00 Total $30.00/5 = $6.00 each person, savings of $10.00 It may be easiest to send me all of the payments and I will pay Bernhard, thus eliminating the confusion in shipping charges. Bernhard and I have agreed to wait two weeks before finalizing the order. Best Regards, Dale P.S. Please send all queries on what's available to Bernhard. I am only handling the USA/CA redistribution to save us some money. __________________ doing my part to Keep Austin Wierd.

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