Gordon Gibby
开云体育I barely know how to do this, but I uploaded the design document, and the zipped gerber files (which pcbway.com was happy with) to this github directory:
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From: [email protected] <[email protected]> on behalf of Gordon Gibby <ggibby@...>
Sent: Sunday, August 12, 2018 11:15 PM To: [email protected] Subject: Re: [BITX20] Harmonics ?
I bit the bullet and submitted files to pcbway, for 10 printed circuit boards for external relays.?
While I was at it, I threw on a small bit of circuitry to give me a 3 terminal regulator and a backwards diode etc so if? I need to regulate a voltage for the receiver downwards, i can do that.??
printed circuit boards are amazing.? ? ?My local ARES group absolutely reduced their building time by at least 80% when I switched to giving them printed circuit boards that just have to be populated, rather than piont to point wiring.? ?My own building
time went down similarly though i was much faster than beginners of course.
My plans are to get them this optional external relay set,? and also an optional daughter board with the popfix for those with v3 boards and maybe the AGC also..... but all that is in the future.? ?FIRST just to help them learn how to wire up the ubitx,
with a bit of resistance in the speaker line if they have the IC amplifier.? ???? One step at a time!
I just got PAT working for the very first time on WINMOR....amazing....will give us winlink access from raspberries to uBitx transceivers.? ??
Gordon
From: [email protected] <[email protected]> on behalf of Kees T <windy10605@...>
Sent: Sunday, August 12, 2018 10:53 PM To: [email protected] Subject: Re: [BITX20] Harmonics ?
On Sun, Aug 12, 2018 at 09:14 PM, Gordon Gibby wrote:
Gordon, The ground pins on the filter trays are connected to the ground plane on the board and there are 3 grounds and the coax shields which return to uBITX ground. I'll also send the ground plane image. Does not have anything to avoid energy getting around the coils. Just basic LPF design, if/when the LPF is not used, both ends of that LPF are grounded. Relay contacts are redundant and bifurcated. 73 Kees K5BCQ |