MARKET CENTRE
Cash in your surplus gear. Advertise it here in SILICON CHIP
FOR SALE
PCB MANUFACTURE: single to multi
layer. Bare board tested. One-offs to
any quantity. 48 hour service. Artwork
design. Excellent prices. Check out our
specials: www.ldelectronics.com.au
LEDs, BRAND NAME and generic
LEDs. Heatsinks, fans, LED drivers,
power supplies, LED ribbon, kits, components, hardware, EL wire. www.ledsales.com.au
tronixlabs.com - Australia’s best value
for hobbyist and enthusiast electronics
from adafruit, DFRobot, Freetronics,
Raspberry Pi, Genuino and more, with
same-day shipping.
PCBs MADE, ONE OR MANY. Any format, hobbyists welcome. Sesame Electronics Phone 0434 781 191.
sesame<at>sesame.com.au
www.sesame.com.au
WANTED
WANTED: EARLY HIFIs, AMPLIFIERS,
Speakers, Turntables, Valves, Books,
Quad, Leak, Pye, Lowther, Ortofon,
SME, Western Electric, Altec, Marantz,
McIntosh, Tannoy, Goodmans, Wharfe
Where do you get those
HARD-TO-GET PARTS?
Where possible, the SILICON CHIP On-Line
Shop stocks hard-to-get project parts,
along with PCBs, programmed micros,
panels and all the other bits and pieces
to enable you to complete your
SILICON CHIP project.
KEEP YOUR COPIES OF
SILICON CHIP
AS GOOD AS THE DAY
THEY WERE BORN!
SILICON CHIP
On-Line SHOP
www.siliconchip.com.au/shop
dale, radio and wireless. Collector/
Hobbyist will pay cash. (07) 5471 1062.
johnmurt<at>highprofile.com.au
KIT ASSEMBLY & REPAIR
KEITH RIPPON KIT ASSEMBLY &
REPAIR:
* Australia & New Zealand;
* Small production runs.
Phone Keith 0409 662 794.
keith.rippon<at>gmail.com
VINTAGE RADIO REPAIRS: electrical mechanical fitter with 36 years
ex
p erience and extensive knowledge of valve and transistor radios.
ONLY
95
$
1P6LUS
p&p
A superb-looking
SILICON CHIP
binder will keep
your magazines in
pristine condition.
* Holds up to 14 issues
* Heavy duty vinyl
* Easy wire inserts
ORDER NOW AT
www.siliconchip.com.au/shop
Professional and reliable repairs. All
workmanship guaranteed. $10 inspection fee plus charges for parts
and labour as required. Labour fees
$35 p/h. Pensioner discounts available on application. Contact Alan
on 0425 122 415 or email bigal
radioshack<at>gmail.com
DAVE THOMPSON (the Serviceman
from SILICON CHIP) is available to help
you with kit assembly, project troubleshooting, general electronics and custom design work. No job too small. Based
in Christchurch, NZ but service available Australia/NZ wide. Email dave<at>
davethompson.co.nz
ADVERTISING IN MARKET CENTRE
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Closing date: 5 weeks prior to month of sale. To book, email the text to silicon<at>siliconchip.com.au and include your
name, address & credit card details, or phone Glyn (02) 9939 3295 or 0431 792 293.
its value, perhaps to 0.22W or possibly even lower.
You may want to consider building
the HT power supply PCB from the
valve preamplifier described in the
November 2003 issue instead. That
particular circuit was over-designed
for the task but it would comfortably
drive the number of valves you are
contemplating.
You can see a free 2-page preview
of the article at www.siliconchip.com.
siliconchip.com.au
au/Issue/2003/November/A+12AX7+
Valve+Audio+Preamplifier
You can order the PCB at www.
siliconchip.com.au/Shop/8/691
Low-voltage audio
amplifier module
I built a small headphone
amplifier circuit using a TDA2822
running off a single Lithium-ion cell
(3-4.2V). Would it be a good candidate
for Circuit Notebook?
• While the TDA2822 is rated to work
down to 3V, even at 4.5V it would be
delivering very little power into a 32W
load and what power was delivered
would not be particularly clean.
It seems that much better results
could be obtained from a purposedesigned chip such as the TDA7266D
as used in the One-Chip 2 x 5W Mini
Stereo Amplifier in the November
2014 issue.
SC
February 2017 103
