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Thanks Bill for your link. Been too busy with work to play with the bitx, but will be back on it the coming week. I will have to go back to messages from yourself and John to try to wrap my head

I checked the drive at the DDS input and found it to be 1vpp. (from internal VCO) I did this because I plan to add a DDS also and have a few. I have 2 of the N3ZI ver.1 DDS and 2 homebrew Uno>9850.

I happened to be working on an MKARS80 which is a variant on the BitX. I realised that this rig uses a Pic 16f818 as a frequency counter with LCD readout and it generates a huff n puff voltage. If

Just a reminder to those using the si5351. Turn OFF unused outputs. They will default to a frequency and as in my case cause 'sproggies' across the bands. You can check using a scope etc. to check

not at all. you will be able to upgrade that as well! just wait a few... BITX20@...> wrote:

So does this mean the Bitx40 board that just arrived is now out of date? What has been updated, is there an update for existing boards or do I buy another Bitx40? Bruce VK2RT

we have been working at an update to the bitx40. i was to give hfsigs the final go yesterday but i have had to stall it due to a family emergency. the new bitx40 will roll out very soon! until then we

http://archive.feedblitz.com/602502/~4780902 Sent: Saturday, December 17, 2016 2:58 PM To: BITX20@... Subject: [BITX20] Help with Digital VFO install Here is my hack problem. I

I too had to get rid of C91 when adding an external VFO.? Details here, in the last couple of paragraphs: Hacking the Hackable BITX 40 Module: VFO is the Way to Go!? | | | | | | | | | |

Haven't tried this but it should be possible to use L4 (taking off a few turns?) as the inductor in the LPF, so not wasting any parts. It could even possibly be done on the board, with a capacitor

Peter, I didn't need to remove C91 on my BitX40 board, only L4 and it works perfect with a Si5351 and a Arduino, however i too was getting harmonics from the Si5351, so I added a LPF between it and

Adding a DDS isn't all plain sailing. I got a horrible whine that was coupled into the BitX via the power supply rail. I needed to add some caps and big RF choke to provide isolation. That removed

Yes - C91 has to go.

Here is my hack problem. I have the new BITX40 V3 SMD board and want to use a IK3OIL FLL with it. I found where to take the output on the BITX board for the INPUT on the IK3OIL FLL. Do I put

Anyone able to offer some advice on this? The screen shots from my spectrum analyzer are in a folder under my call sign W7AMH. Thanks, Tom

Raj, Thanks for the clarification, and the opportunity to climb upon the shoulders of those who precede me. Thomas W Noel KF7RSF

Peter, in the video you mention removing a cap in addition to the toroid from the VFO circuit when converting to a DDS VFO. Which cap did you decide to remove (I assume it would be C91)? 73, AL -

SolderSmoke Podcast #192 FPM Rig, BITX Module Madness, HRO Al Fresco, Boatanchor Day, Mailbag | | | | | | | | | | | SolderSmoke Podcast #192 FPM Rig, BITX Module

Ah yes, I see it now.? Thanks.

Tnx for the help. I didn't use the right search terms. I will dig up some of the older posts, but will prob. just live with it. Once I have in metal case maybe it will clean up some. My only issue