sorenb Posted August 21, 2015 Report Posted August 21, 2015 (edited) 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.ZIPkgsshvcarboncirclotron.ZIPkgsshvcarboncirclotrondriverv2.ZIPFurthermore 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/ThanksThanks to S_R/NoPants for contributingBoards has been shipped.Update: 470uF caps are comming 13/11 (according to FTCap). (17/10-2015) Edited November 4, 2015 by sorenb
s_r Posted August 21, 2015 Report Posted August 21, 2015 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.
kevin gilmore Posted August 21, 2015 Report Posted August 21, 2015 a complete set of boards is2 x output boards2 x driver boards4 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)
nopants Posted August 21, 2015 Report Posted August 21, 2015 (edited) 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, 2015 by nopants
sorenb Posted August 21, 2015 Author Report Posted August 21, 2015 S_R+Nopants: Thanks, posting corrected.
Victor Chew Posted August 22, 2015 Report Posted August 22, 2015 This looks really tempting to build. Will this amp measure up in performance against the T2, BHSE, KGSS carbon or the Megatron?
Laowei Posted August 22, 2015 Report Posted August 22, 2015 I would be interested in a board set and caps.
sorenb Posted August 22, 2015 Author Report Posted August 22, 2015 (edited) 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, 2015 by sorenb
s_r Posted August 22, 2015 Report Posted August 22, 2015 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?
kevin gilmore Posted August 22, 2015 Report Posted August 22, 2015 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.
Earspeakers Posted September 1, 2015 Report Posted September 1, 2015 (edited) What's the status of the GB, any updates ? Edited September 1, 2015 by Earspeakers
sorenb Posted September 2, 2015 Author Report Posted September 2, 2015 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 sheetThe 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.
JoaMat Posted September 2, 2015 Report Posted September 2, 2015 (edited) / Edited November 11, 2015 by JoaMat
Victor Chew Posted September 3, 2015 Report Posted September 3, 2015 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.
chiguy Posted September 3, 2015 Report Posted September 3, 2015 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.
sorenb Posted September 4, 2015 Author Report Posted September 4, 2015 (edited) 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, 2019 by sorenb
sorenb Posted September 10, 2015 Author Report Posted September 10, 2015 Circlotron boards has been ordered today./S
DHTGUY Posted September 11, 2015 Report Posted September 11, 2015 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.
sorenb Posted September 13, 2015 Author Report Posted September 13, 2015 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
sorenb Posted September 14, 2015 Author Report Posted September 14, 2015 (edited) 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, 2019 by sorenb
sorenb Posted September 18, 2015 Author Report Posted September 18, 2015 Estimated ship date from PCBNet rgrd the Circlotron boards 22 of september 2015
sorenb Posted September 23, 2015 Author Report Posted September 23, 2015 (edited) Circlotron boards arrived at Jays today. Will start shipping ASAP. Edited September 23, 2015 by sorenb
jdineshk Posted September 30, 2015 Report Posted September 30, 2015 Boards to US recipients were mailed on Monday.
Laowei Posted September 30, 2015 Report Posted September 30, 2015 ^ All that just to power some headphones. Love the overkill! Can there ever be MOAR after the Circlotrons are built?
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