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Hi Alyson, no big deal, the cell phone is fine, but if you’re able to get one with a little more even lighting that covers all the wiring underneath where the relays were, that would be great.

Gordon, If you need a better picture I can grab the camera instead of the cell. I doubt there many have remove more than one relay and only because it was bad.? Even with the right gear its still a

Hi Alison! Yes, I saw those photos and thank you for sending them again! They will make it very easy to see exactly which traces need to be cut. I took a quick gander at them, and I think I can see

Jerry, That ended up in a different topic.? Compliance summary.... You are nearly there as you need to know what the RBW Receiver Bandwidth Window is and the sweep time to evaluate the result.? If

Allison, you lost me on your last para (below)??? The filter is high pass so moving the corner as you suggest would not remove the 23.55 spur. I did design a BPF for the 15M band but it's? a

Gordon, The real problem and it came up elsewhere is getting to the traces so you can still use the relay. We went down the rat hole of desoldering the relays as unfortunately most of the conductors

Hi Phillip, could you describe where you inserted the LM386 on your ubitx ? kevin rea lancaster, calif. k6rea

Jerry, VBW in the simplest form is a low pass filter after the detector to take out high frequency noise.? If overdone you start filtering useful information as we are dealing with signal over time.

Hi Kees Yes, correct. 73 Hans G0UPL http://qrp-labs.com

Warren, For once rather than complain, do something beside discover the past. If you don't like it learn to push next. This was hashed over back in 2015, and 16 and now.? Its not prescience its

For the ubitx? the 80/75/60M filter has a cutoff of 5.6mhz and a fairly steep slope. Least that's what I measure off the board.? so at 7mhz is has decent attenuation of? harmonics even the second.

The diode ring mixers have stuff going in and out of all three ports, terminating all three ports into 50 ohm pads helps to dampen undesirable products. But if you want a 6dB pad between the si5351

Regarding Spectrum Analyzer basics: Well, that was easy enough. But need to study up on VBW in particular, haven't yet found a full description. I assume the name "video bandwidth" comes from analog

I was figuring we're best off looking hard at everything between the mike and that first mixer, adding sufficient feedback in each amp such that we get consistent results. Gain distribution needs

never mind.. i figured it all out.. works good. thanks for the info you put up on this John. Kevin

Henning, The 6db pads are there to try and tame the wily DBM.? They provide a optimized match to the ports for best possible performance.? Also because the 5351 is not? a 50ohm output devices as it

When I made my LPF for the contests bands I actually used the schematic of communication-concept harmonic filters https://www.communication-concepts.com/content/FL1_Manual.pdf. So if the 'corner'

Yes, it improve the gain but we really don't need that as it just makes over drive worse. Using 1mhz/1mhz is fair and resonable.? The whole of comments was for a different posting. An very yes, all

Yes, shipping, duties and other margins will rise the price quite a lot. It's the same in Europe for reasonably priced US amps like Ameritron that nearly cost as much as a Acom. So I Iook forward for

Key is, on my cell phone I can’t see message numbers, but this is simply building the stylistic schematic I drew and took a photograph of a couple days ago. $6 in relays, i’ll get the board made