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Re: How does this look?
开云体育But look at how resilient the PA is… when you over-drive it… its doesn’t blow up… it just goes into compression and “flat tops” like you would want it to… like an audio amp when you are over driving the input… ? The assembly manual has instructions for adjusting the PAD to meet your needs. ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of David Dill via groups.io
Sent: Saturday, May 31, 2025 1:41 PM To: [email protected] Subject: Re: [AmateurRadioBuilders] How does this look? ? Got it. Distortion. Thanks Bill ?
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Re: How does this look?
开云体育Ah yes, you are over-driving the 20W PA…? you need a larger PAD. ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of David Dill via groups.io
Sent: Saturday, May 31, 2025 12:33 PM To: [email protected] Subject: Re: [AmateurRadioBuilders] How does this look? ? attached |
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Re: [SoftwareControlledHamRadio] Front panel matrix
开云体育As long as its consistent... it should not matter... ? I designed the LPF for this set (which is the Kenwood/ Elecraft/ Yaesu/ etc. standard): ? But somehow that got twisted.? These standards are important because there is a connector on the LPF control board to send these to the back panel to operate devices external to the radio like antenna switches, filters, amps, etc. that also have programming for these standards.? ? ? The average person should not have to worry about this… because when connected, it just works… ? ? ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: www.VillaGrandPiton.com ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? -----Original Message----- ? On 2025-05-31 09:14, K9HZ wrote: > Hey one thing here… I have to redefine the radio band structure every > time I use a new version of the software to include the missing bands > (e.g. 630M, 160M, 4M, 2M, 1.25M, 70cm, 33cm, 23cm).? Obviously some of > these bands take hardware that is not currently present…(notably > 2M-23cm). But it’s tough to work on the hardware for those bands when > the bands keep disappearing! ? *** Indeed.? And every time I load new software, I have to redo the support for my linear.? For those unimplemented bands - maybe a #define? ? ???????????????????? - Jerry, KF6VB ? ? ? ? |
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Re: How does this look?
开云体育What does it look like before it goes into the 20W PA? ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of David Dill via groups.io
Sent: Saturday, May 31, 2025 11:21 AM To: [email protected] Subject: [AmateurRadioBuilders] How does this look? ? Builders,? ? I have just completed the 20W board and it is putting out a healthy 20 watts. ? I am using a Hermes lite to drive it.?? When I put a CW signal through it, with no Low Pass filter, my waveform looks like this. ? Does this look like a reasonable before Low Pass filtering? Thanks for your input. David W0NP ? ? |
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How does this look?
Builders,?
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I have just completed the 20W board and it is putting out a healthy 20 watts.
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I am using a Hermes lite to drive it.??
When I put a CW signal through it, with no Low Pass filter, my waveform looks like this.
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Does this look like a reasonable before Low Pass filtering?
Thanks for your input.
David
W0NP
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Re: [SoftwareControlledHamRadio] Front panel matrix
开云体育Hey one thing here… I have to redefine the radio band structure every time I use a new version of the software to include the missing bands (e.g. 630M, 160M, 4M, 2M, 1.25M, 70cm, 33cm, 23cm).? Obviously some of these bands take hardware that is not currently present…(notably 2M-23cm). But it’s tough to work on the hardware for those bands when the bands keep disappearing! ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of Oliver KI3P via groups.io
Sent: Saturday, May 31, 2025 9:08 AM To: [email protected] Subject: Re: [SoftwareControlledHamRadio] Front panel matrix ? It matches this button layout: ?
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Re: K9HZ amp bias
开云体育Depends on what you are trying to accomplish.? The “cleanest” AM signal is amplified by a class “A” amplifier.? You CAN do that with my amp but limit it to about 7 watts maximum.? Just increase the bias to the point where the amp draws as much current without RF excitation as it does with full excitation.? I can give you the gate voltage to do that on Thursday if you would rather set it that way.? It will work just fine a lower classes in AM though. ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of Larry Acklin via groups.io
Sent: Tuesday, May 27, 2025 1:34 PM To: [email protected] Subject: [AmateurRadioBuilders] K9HZ amp bias ? I’m toying with an EdenTRX / DSP rig which is capable of AM. If I combine it with a 20W K9HZ (“Bill”) amp, is the building instructions stated bias value correct? It seems to me that AM and SSB are the same with the type of bias adjustment (AB I think) so it would work? ? thanks Larry KB3CUF ? |
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Re: Sourcing HF41 relays
开云体育The HF41’s? were designed for RF service.? Elecraft and Icom use them in their radios because of that and they are compact. ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of Tim via groups.io
Sent: Monday, May 26, 2025 12:45 PM To: [email protected] Subject: Re: [AmateurRadioBuilders] Sourcing HF41 relays ? I have not tested the HF41 relays, on my todo list though. I was rebuilding a few FT-102 transceivers and they use an Omaron relay, originals were quite good spec wise. I found some on ebay and other sites and started to test them with micro ohm tester and cycling them 1K times and rechecking. Most were Chinse copies (look identical) and the resistance would increase across the contacts after 1K cycles (using low level rf signal). I eventually found some OEM originals and the difference was dramatic.? IF I can find some time I will do same test on the HF41 relays. Tim W4YN |
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Re: [SoftwareControlledHamRadio] MF changes
开云体育My apologies.? I’ve been on the road since before Hamvention and unavailable for the most part.? I’ll be back home as of Thursday AM and have a lot of catching up to do with orders from Hamvention (and a few prior) and documentation with the latest board revs.? Some of the changes to boards are so minor that I did not update the documentation for them.? On the other hand… a few more extensive changes were made to the RF board in the MF section that makes assembly much easier… however not documented yet (IN THE ASSEMBLY MANUALS ONLY… the schematics and BOMs are ALWAYS up to date… the assembly manuals take a complete review to update). ? I’ll be making a few additional minor updates to the MAIN board in the next round of boards I order… the new ISO SPI driver will be incorporated into the MAIN board so the plug-in Display Driver board will then be built-in.? It’s been a big success with over 250 kitted and sold to date. ? Here is some food for thought for next Hardware directions. ?
? I’ve been looking into getting BPF and RF boards made with the small semi-conductor parts prepopulated.? On the RF board, that means the PE4302’s and the si5351 would come pre-populated.? The rest of the parts are easy to solder.? The switches on the BPF would come pre-placed.? All at a very nominal cost (less than $0.50 per part plus part cost in the quantity I buy). ? Always looking for your thoughts. ? ? ? ? ? Dr. William J. Schmidt - K9HZ J62K(J68HZ) 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ ? Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois ? Owner – Operator Villa Grand Piton – J68HZ Soufriere, St. Lucia W.I. Rent it: ? Moderator: North American QRO Group at Groups.IO. Moderator: Amateur Radio Builders Group at Groups.IO. ? email:? bill@... ? ? From: [email protected] <[email protected]> On Behalf Of David Fine
Sent: Monday, May 26, 2025 10:45 AM To: [email protected] Subject: [SoftwareControlledHamRadio] MF changes ? Can anyone tell me if the changes made regarding the MF frequencies are documented anywhere?? Were changes made in the BOMs or assembly manuals for the affected boards?? I have been unable to find them.? Thanks. Dave. W0DF |
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Re: Sourcing HF41 relays
Still works fine here.They have multiple relays on offer so it seems unlikely they are out of all of them.
At a guess this is somehow ... lets call it tariff related. Although I would have expected a simple "This cannot ship to your region" in the shipping panel.
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Try it using a VPN to appear outside the US. Like I said your mileage may vary.
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On Sat, May 24, 2025 at 09:27 PM, John Owens K1JO wrote:
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K9HZ
John Owens K1JO