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Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ Soufriere, St.

Much of it is already captured on UBITX.net Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator

These parts are genuine too: http://www.thepartsplace.k5nwa.com/index.php?route=product/product <http://www.thepartsplace.k5nwa.com/index.php?route=product/product&product_ id=61> &product_id=61 Dr.

Well this is not entirely true. You will get about the same performance out of the RD16HHF1 as that of the IRF510 by just replacement. Where the RD16HHF1 comes alive is when you also do other mods.

I added variable BW to my uBITX by placing BB112 VVCs across C218, C219 and C220. ?I use the RX voltage varied by a 10K panel mounted pot on receive and the TX voltage on transmit to make the BB112s

Note: I used the wrong resistor (15K) and that reduced the audio way too much. I am now using a 10 Ohm resister and now its great!

Yep, I had some wide digi modes to try on 10m, so it appears I'd have to use SDR for those. Anyway, thanks for reply.

Thanks Allison. I forgot about the K2 and will check the schematic when I return home. One nice thing about the old MXM circuit was that it was continuously variable rather than the step system used

No.? And did you really mean 23KHZ?? That the width used for the old wide FM 15khz deviation. Generally ladder filters for even 6-8khz are difficult at 12mhz, between ripple and notches at the edges

Once the proper capacitance has been determined for 2800 Hz and 500 Hz bandwidth, it should be possible to use fixed capacitors with diode, transistor, MOSFET, or relay switching to select bandwidth.

The hyperabrupt diodes can easily go from a 400pf down to 50 and there are smaller value diodes for the 40- 250pf range.? They are not all that cheap. The alternate is switching between two filters

Gary,? if you need large type let us know. Using Varicap diodes is do able as the Elecraft K2 does exactly that. Allison

Managed to get my thinking on the caps.backward...the current filter is already designed for SSB, so we would have to lower the cap value for CW filter, not increase. Reminds me I shouldn’t do

I apologize if this topic was covered in an early message string, but I have only been actively reading the list for a couple of weeks and noticed a couple of posts about it. In the mid-1990s, I built

the FTDI interface board has selectable 5 or 3.3 volt TTL logic levels, along with lead for the reset pin. it's intended for Arduino boards that do not have the Serial interface chip.? -Justin N2TOH

Has anybody drawn out a schematic for the USB & D9 connectors supplied with Inkits metal chassis kit? I know it has been suggested to them, but I don't think they've posted anything yet. Thanks.

Same here! Only 2 stations on FT-8, and my 100W FT-8 signal is only getting out about 700 miles. ? -- John - WA2FZW

Hello Discussions about reading FWD and REV power and SWR bring to mind a possibility that I have not yet seen in BITX software. Would it be advantageous to periodically check RF measurements and

Many things....? Layout being the most important. Copying the board layout with leaded parts on copper (dead bug) is not the same and leads will get you.? Also in that format you build power stages

Hi, can you extend input SSB filtering to from 2.5kHz to 23kHz? Thanks, J.