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Author Topic: Quickie 1.0 manual correction - battery reversal  (Read 13133 times)

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Offline Paul Joppa

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Quickie 1.0 manual correction - battery reversal
« on: January 07, 2012, 05:51:38 AM »
There is an error in the manual for the original Quickie kit, v1.0. The D cells, which power the filaments of the tubes, are wired in reverse. The preamp still operates (actually sounds quite good) but the voltages and the battery life are not optimal.

If you have already built the Quickie, the easiest solution is to install the D cells in the holders backwards.

If you have not built it yet, I recommend that you exchange the connections to the tubes. On page 21, connect the black wires to A5 and B5 (NOT A1/7 and B1/7). At the bottom of page 24, connect the black wire from terminal 2L to socket pins A1 and A7. Similarly connect the black wire from 4L to B1 and B7.

We will eventually post corrected voltage measurements, and produce a revised manual.
« Last Edit: May 26, 2013, 08:20:31 AM by Doc B. »
Paul Joppa

Offline JONO

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Re: Quickie manual correction - battery reversal
« Reply #1 on: February 15, 2012, 09:57:21 AM »
I posted my mesurements in http://www.bottlehead.com/smf/index.php/topic,594.msg3810.html#msg3810. Can anyone confirm?

Offline Paul Joppa

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Re: Quickie manual correction - battery reversal
« Reply #2 on: February 15, 2012, 10:29:13 AM »
Sorry, I should have posted when that appeared. I just did so and said:

The voltages with "D negative to pin 5 (schematic diagram)" are almost exactly the theoretically expected voltages, as designed.

I picked up a kit last week but haven't built it yet. Until I do, the tube voltages should be:

pin 1 3.5v
pin 2 28v
pin 5 2.0v

Pin 5 is the top of the 1K cathode resistor, and 2.0v indicates 2.0mA cathode current.
Pin 2 is the plate and indicates the plate is at about 75-80% of the high voltage battery (nominally 36v when new)

The 9-v batteries will last a bit longer, and the headroom will be a bit greater and more symmetrical, with the correct orientation. In most cases you won't hear a lot of difference - tubes are pretty tolerant that way.

Once I am done with my build and measurements, I'll be posting some variations, optimizing for different situations - particularly using output transformers with headphones.
Paul Joppa

Offline denti alligator

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Re: Quickie manual correction - battery reversal
« Reply #3 on: September 13, 2012, 12:14:09 PM »
I followed these changes and got different voltages at 1, 5, and 7 (and not 2):

A/B1: 2.757/2.530

A/B5: 1.216/0.963

A/B7: 2.777/2.534

Are these OK?


EDIT: It certainly sounds good.
« Last Edit: September 13, 2012, 03:43:25 PM by denti alligator »
- Sam

Rega P3-24 (w/AT 150MLX) w/Groovetracer upgrades / Eros II / FLAC -->J.River -->DSD256 -->Gustard X20 / Stereomour II / Klipsch Forte II w/Crites upgrades / C4S S.E.X. 2.0 +Nickel MQ Iron / Speedball Crack / Sennheiser HD600 w/Cardas cable

Offline Paul Joppa

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Re: Quickie manual correction - battery reversal
« Reply #4 on: September 13, 2012, 05:44:26 PM »
I assume that "(and not 2)" means you got close to 28v at the plates, pin 2?  If your 9v batteries are also fresh (36 volts), then I would guess your tubes may be a bit worn since the current is a bit low. If the tubes are very new, they may get a little more current as the cathode finishes its forming process.
Paul Joppa

Offline denti alligator

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Re: Quickie manual correction - battery reversal
« Reply #5 on: September 28, 2012, 02:12:14 PM »
So does this alter how I install the PJCCS?
- Sam

Rega P3-24 (w/AT 150MLX) w/Groovetracer upgrades / Eros II / FLAC -->J.River -->DSD256 -->Gustard X20 / Stereomour II / Klipsch Forte II w/Crites upgrades / C4S S.E.X. 2.0 +Nickel MQ Iron / Speedball Crack / Sennheiser HD600 w/Cardas cable

Offline Paul Joppa

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Re: Quickie manual correction - battery reversal
« Reply #6 on: September 28, 2012, 03:55:55 PM »
So does this alter how I install the PJCCS?
No, the PJCCS adapts itself to varying voltages fairly well. Check the battery and plate voltages after it's installed and report them here if they are less than 5 volts different - in which case we might want to make some adjustments. But it's not especially likely.
Paul Joppa

Offline Zimmer64

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Re: Quickie manual correction - battery reversal
« Reply #7 on: November 27, 2012, 05:23:56 AM »
Hi,

I have just built a Quickie incl. the PJCCS and only now read the manual correction post.....

I have a question: Was the manual corrected for your latest shipment?

Best regards,

Michael

Edit: Just figured. Tha October manual is still wrong. I will switch the batteries around as suggested.
« Last Edit: November 28, 2012, 12:02:44 AM by Zimmer64 »
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4krow

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Re: Quickie manual correction - battery reversal
« Reply #8 on: December 15, 2012, 11:08:19 AM »
Soooo, I left my Quickie on by mistake for a few days....if I reverse the batteries, will it work again? Seems like it did on Star trek...

Offline 2wo

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Re: Quickie manual correction - battery reversal
« Reply #9 on: December 15, 2012, 12:57:58 PM »
NO Don't do it! You will suck the music right out of the room...John
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Offline earwaxxer

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Re: Quickie manual correction - battery reversal
« Reply #10 on: December 15, 2012, 01:00:19 PM »
'I've done that man!' - Cheech & Chong - It shuts itself off after the D-cells go dead.
Eric
Emotiva XPA-2, Magnepan MMG (mod), Quickie (mod), JRiver, Wyrd4sound uLink, Schiit Gungnir, JPS Digital power cord, MIT power cord, JPS Labs ultraconductor wire throughout, HSU sub. powered by Crown.

Offline proud indian

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Re: Quickie manual correction - battery reversal
« Reply #11 on: December 16, 2012, 06:33:20 AM »
At the end of the day, the battery's + side does not really sit on the springs properly and you may have to rotate the battery for better contact. I reversed the wires. If there is a mistake correct it!!! Reversing the batterys is more of a "Band aid" solution. After doing the wires the other way, it sounds much better and I find better channel balance and even sound stage width.

shreekant :)

system 1. oppo, quickie,SEX 2.1 ( V cap), Decware DFR8 in ZOB cabs
System 2. Tascam cd200, Terra Dac,Zbox,Decware Zen amp(V cap) Lowther PM6A in Acousta horns.
Maple rack, Brass footers,Power conditioner, dedicated treated room, iso pads, plenty of tubes. All cables DIY.

4krow

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Re: Quickie manual correction - battery reversal
« Reply #12 on: December 16, 2012, 04:32:26 PM »
Eric, did you bait shreekant? hmmm must have been 2TWO

I want to invent the 'anti-bulb'. When you turn it on, it sucks all the light from a room, just like a regular bulb sucks all the darkness from a room. Then, I will turn them both on and let 'em fight it out.

Offline pushbroom

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Re: Quickie manual correction - battery reversal
« Reply #13 on: May 26, 2013, 04:17:23 AM »
I am currently building a quickie 1.1...are these changes reflected in the manual?  the page numbers don't coincide with the earlier post, and my browsing hasn't sufficiently answered.

- josh
Josh
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Offline jimiclow

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Re: Quickie manual correction - battery reversal
« Reply #14 on: May 26, 2013, 04:40:04 AM »
I think it only applies to version 1.0.
The 1.1 version was only released in February.
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