No, this group is for ALL of the BitX. From the group description:
"This group exists for constructors of the various BITX projects"
There are people here that have built all of the different BitX flavors. David, you're in the right place.
Vince - K8ZW.
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On 08/12/2018 06:29 PM, Timothy Fidler wrote:
David the site is mainly for the uBitx multiband and the Bitx40 which
is either VFO or "DDS" controlled so many of your comments won't make a
lot of sense to those who purchased these pre stuffed boards as in SMD.
It is prolly a bit late to mention this but Fred at Far Circuits in US
sells a Bitx board set of etched PCBs. you could possibly get him to
part with the main bitx board for $15 USD. The other board is the class
A power amp which can easily be done on islanded copper clad board.
AGC can be done with the TDA7062A or AT chips which have an AGC pin
built in .. you sink it to GND with an NPN transistor to mute the chip.
one option there is found by studying the MST3 schematic on the
ozQRP.com site of Leon in NSW. go to documents section (or even look at
the old MST2 board under the archive documents section) Obviously 2 or
four small signal diodes and a ceramic capacitor will give you AGC volts
from further back in the radio for RF agc..... That TDA is hard to get
from normal suppliers , Farnell has it but it is all over the PRC ebay
internet at low prices. the TDA without the A or AT suffix does not
have the mute pin. cheers TEF
--
Michigan VHF Corp.
