GROUP BUY CLOSED 4. NOVEMBER 2015

 

For gauging interest. This GB is intended to be add-on to the MWL168 Carbon Group Buy for anyone interested in building a Circlotron.
In addition to a full Carbon, two dual HV900 boards (circlotronhvpowerdualnewer2.ZIP) and two output & driver boards (kgsshvcarboncirclotrondriverv2.ZIP/kgsshvcarboncirclotron.ZIP) are needed.

Currently investigating a quote form PCBNet for:

circlotronhvpowerdualnewer2.ZIP

kgsshvcarboncirclotron.ZIP

kgsshvcarboncirclotrondriverv2.ZIP

Furthermore FTCaps has been asked for delivery of the 470uF/550V caps required by the HV900 supply.
The main difference between the 680uF/550V(76mm) cap and the 470uF/550V(68) is the height, making it easier to fit everything inside a 5U chassie.
16 of 470uF/550V are needed for the Circlotron HV900 supplies.

Please state your interest in the sheet.
Price of the 470uF Caps, will be close to the estimate of 680uf/550V @ 12USD.

 

Estimated ship date from PCBNet rgrd the Circlotron boards 22 of september 2015

/Thanks

Thanks to S_R/NoPants for contributing

Boards has been shipped.
Update: 470uF caps are comming 13/11 (according to FTCap). (17/10-2015)

 

Edited November 4, 201510 yr by sorenb

Won't it need the output boards, driver boards, and the HV900 boards? The driver board is different from the regular carbon amp board last I checked.

It might make more sense to offer the boards as a full set, but either way I'm interested.

a complete set of boards is

2 x output boards

2 x driver boards

4 x single hv900 power supply boards (or 2 duals which won't fit in a single box)

1 pair of fat power  450v supply boards (or the dual which also won't fit in the box)

should probably stick to a board set that will fit into a single chassis

 

I also believe the recommended chassis was 5U

Edited August 21, 201511 yr by nopants

S_R+Nopants: Thanks, posting corrected.

This looks really tempting to build.  Will this amp measure up in performance against the T2, BHSE, KGSS carbon or the Megatron?

I would be interested in a board set and caps.

Please state your interest in the sheet.

Quotes from PCBNet added to the sheet.
Summary if interest less than 10 Circlotrons the set price is approx. 150USD. If close to 20, the price of each set is 80USD.

Edited August 22, 201511 yr by sorenb

Just to add, the HV900 boards should be the single type. So it'd be 4 HV900 boards per amp that way.

Also, could you offer the 450V fat/split PSU boards as well?

the circlotron is the only push pull fully direct coupled electrostatic amplifier that is buildable with current parts.

Also at 25ma, rise and fall time are faster than  any other electrostatic amplifier of any kind.

What's the status of the GB, any updates ?

Edited September 1, 201511 yr by Earspeakers

Quote from PCBNet.

The HV900 PCB has been changed from Dual to Singles, all amount in the sheet in rgrds to HV900 has been adjusted to x2 the previous.
Latest quote price has been entered as well, and an estimated price for caps+boards been calculated.

Please confirm your order in the sheet

The GB will be closing by the end of this week, and the order submitted to PCBNet (caps are already ordered by JDineshk)

/Thanks

Just to add, the HV900 boards should be the single type. So it'd be 4 HV900 boards per amp that way.

Also, could you offer the 450V fat/split PSU boards as well?

Sorry for late responding on this.

The HV900 has been changed to singles as requested.

I'll add the fat/split PSU to the sheet to probe interest. we need at least 10 boards to make it fly.

/

Edited November 11, 201510 yr by JoaMat

Isn't it 2 caps for each fat supply, making it 4 for left and right; plus another 8 for the 900 supplies making it a total of 12? I stand correct.

It's 4 caps per single 900V supply of which you need 4 of.  So 16 total.  The fat power supply needs its own caps.

Updated first post with link's to caps specs:  470uF/550V, and 680uf/550V 

For those ordering Circlotron PCBs and caps, please PayPal me the amount stated in the spreadsheet: [email protected].

Please remember to include your head-case ID with your PayPal payment.
As soon as the payment has been received we will go ahead and place the order at PCBNet.
The orders for caps has been submitted today, and is added to the same spot in the production queue as the 680uf caps. 
All caps will be delivered at the same time.

Thanks

/S
 

Edited May 1, 20197 yr by sorenb

Circlotron boards has been ordered today.

/S

Sorry - I read for gauging interest, so I put my name down. I'm not ready to order - perhaps a later group buy. I'll take my name off as the order has been placed already.

Sorry - I read for gauging interest, so I put my name down. I'm not ready to order - perhaps a later group buy. I'll take my name off as the order has been placed already.

As per request you have been removed from the GB

ONYLY NON-US

In order for preparing the upcomming shipping of Caps / Circlotron boards / Carbon boards for those who selected combined shipping, I would like every participant to write me a mail ([email protected]), in the subject field write: Head-case ID, Shipping; e.g. "sorenb, Shipping".

The mail body containing three sections:

1. Your complete adresse, as you want it to be printed on the package
2. The way you want to have it declared; please explain if you want your package declared in a certain way in order to have it through customs without additional hassles.
3. If you want to have enclosed a note in the package, please state the wording you prefere.

Thanks

/S

Edited May 1, 20197 yr by sorenb

Estimated ship date from PCBNet rgrd the Circlotron boards 22 of september 2015

Circlotron boards arrived at Jays today. Will start shipping ASAP.

Edited September 23, 201510 yr by sorenb

Boards to US recipients were mailed on Monday.

 

 

^  All that just to power some headphones.  Love the overkill! 

Can there ever be MOAR after the Circlotrons are built?