Date   
HT20 Alive!

Curt
 

The radio worked when turned on, and no smoke escaped!  Alignment was easy as described in the manual.  The receiver is fantastic, and am getting 5W output with a 12VDC supply.  One question is whether I can use the shack 13.8VDC supply without blowing up the finals?  Also, what is minimum voltage?  Will a 9VDC battery work, maybe 1W output?

No contacts yet but that will happen soon.

I think the little green box will become one of my favorites.  When the weather cools a bit, from the patio with an EFHW n tuner ought to be fun.

Thanks Dave and 4state!

Curt KB5JO

Re: HT20 LPF performance

Dave Benson
 

Curt-

I have. <g>

The source impedance is 12.5 ohms. That's how the HT is able to put out 5W - there's an impedance transformation in the LPF.

73- Dave


On Mon, Aug 26, 2019 at 9:45 AM Curt via Groups.Io <rhulett1=consolidated.net@groups.io> wrote:
Has anyone simulated the HT20 LPF?   Using ELSIE to simulate, must be doing something wrong, seeing 3 dB loss at 14 MHz.  Of course a deep 60 dB suppression at 25 MHz.  I am using 50 ohm input and 50 ohm output impedance.   What does the actual output spectrum look like on a scope?  ( I don't own one ).

Curt KB5JO

Re: HT20 LPF performance

K7AHR
 

I would not expect the input impedance to be 50 ohms, for one thing. This could affect your results substantially, especially where the impedance at the fundamental frequency is concerned.

Re: HT20 LPF performance

Curt
 

Found ARRL Lab test results Dec 2018 QST.  Actual suppression greater than 55 dB

Curt KB5JO

HT20 LPF performance

Curt
 

Has anyone simulated the HT20 LPF?   Using ELSIE to simulate, must be doing something wrong, seeing 3 dB loss at 14 MHz.  Of course a deep 60 dB suppression at 25 MHz.  I am using 50 ohm input and 50 ohm output impedance.   What does the actual output spectrum look like on a scope?  ( I don't own one ).

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

WA4EFS
 

Not sure that I fully understand the problem being discussed, but here goes. If you need to store a large volume of constant data, i.e. more than can be accommodated in Atmel 328 PU SRAM with stability, you might consider using:  https://www.arduino.cc/reference/en/language/variables/utilities/progmem/.

 

Lloyd (wa4efs)

 

From: HilltopperKit@4SQRP.groups.io [mailto:HilltopperKit@4SQRP.groups.io] On Behalf Of Charles W. Powell via Groups.Io
Sent: Saturday, August 24, 2019 2:50 AM
To: HilltopperKit@4sqrp.groups.io
Subject: Re: [HilltopperKit] Hilltopper 20 Kit Excellent quality!

 

Lee,

 

I was using the computer to trigger the keyer, so the memory function comes from the computer not the ATMEL 328PU.  But a small outboard chip might be a more elegant solution and they are only a few bucks.

 

Chas - NK8O

 

 



On Aug 23, 2019, at 12:47 PM, Dave Benson <davek1swl@...> wrote:

 

Lee-

 

The Hilltopper microcontroller IC runs ~ $1.80 in quantities of 100.  That's the 'raw' IC, and I installed the Arduino bootloader to keep the cost down.

 

That said,  'project fatigue' had set in by the time I wrapped up the Hilltopper firmware.  Getting iambic mode B right cost me a few grew hairs, and I'd had enough.  As a practical matter, it's possible that adding a message memory would require an additional pushbutton input to trigger a message playback.  Certainly do-able, but with impacts to both the PCB and enclosure layouts.

 

73- Dave, K1SWL

 

On Thu, Aug 22, 2019 at 11:04 PM Leland L. Bahr <w5drc@...> wrote:

OK, Curt, you convinced me at our today's eyeball meeting.  I just ordered a Hilltopper 20.  Won't start it until I get my 40 meter Organic W8DIZ (Kits and Parts rig up and running.)  I still wish the Hilltopper keyer had a memory.  For me, it seems almost useless without it.  Most likely will use an outboard keyer with a memory so the internal one won't be used.  Why call CQ over and over again when a memory keyer with the CQ stored in it will do it for you.  Don't understand the reasoning for no memory when a chip costs around $5 with a memory.  Will also take your advice and use Vishey bypass caps.  (I threw the green ones away in the Organic 40 and used good quality Vishey there too.)  Other then that, I am looking forward to getting a Hilltopper 20 on the air.

Lee, w0vt, w5drc

On 8/18/2019 12:27 PM, Curt via Groups.Io wrote:

Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

 

 

 

Re: Hilltopper 20 Kit Excellent quality!

Charles W. Powell
 

Lee,

I was using the computer to trigger the keyer, so the memory function comes from the computer not the ATMEL 328PU.  But a small outboard chip might be a more elegant solution and they are only a few bucks.

Chas - NK8O



On Aug 23, 2019, at 12:47 PM, Dave Benson <davek1swl@...> wrote:

Lee-

The Hilltopper microcontroller IC runs ~ $1.80 in quantities of 100.  That's the 'raw' IC, and I installed the Arduino bootloader to keep the cost down.

That said,  'project fatigue' had set in by the time I wrapped up the Hilltopper firmware.  Getting iambic mode B right cost me a few grew hairs, and I'd had enough.  As a practical matter, it's possible that adding a message memory would require an additional pushbutton input to trigger a message playback.  Certainly do-able, but with impacts to both the PCB and enclosure layouts.

73- Dave, K1SWL

On Thu, Aug 22, 2019 at 11:04 PM Leland L. Bahr <w5drc@...> wrote:

OK, Curt, you convinced me at our today's eyeball meeting.  I just ordered a Hilltopper 20.  Won't start it until I get my 40 meter Organic W8DIZ (Kits and Parts rig up and running.)  I still wish the Hilltopper keyer had a memory.  For me, it seems almost useless without it.  Most likely will use an outboard keyer with a memory so the internal one won't be used.  Why call CQ over and over again when a memory keyer with the CQ stored in it will do it for you.  Don't understand the reasoning for no memory when a chip costs around $5 with a memory.  Will also take your advice and use Vishey bypass caps.  (I threw the green ones away in the Organic 40 and used good quality Vishey there too.)  Other then that, I am looking forward to getting a Hilltopper 20 on the air.

Lee, w0vt, w5drc

On 8/18/2019 12:27 PM, Curt via Groups.Io wrote:
Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO



Re: Hilltopper 20 Kit Excellent quality!

Dave Benson
 

Lee-

The Hilltopper microcontroller IC runs ~ $1.80 in quantities of 100.  That's the 'raw' IC, and I installed the Arduino bootloader to keep the cost down.

That said,  'project fatigue' had set in by the time I wrapped up the Hilltopper firmware.  Getting iambic mode B right cost me a few grew hairs, and I'd had enough.  As a practical matter, it's possible that adding a message memory would require an additional pushbutton input to trigger a message playback.  Certainly do-able, but with impacts to both the PCB and enclosure layouts.

73- Dave, K1SWL


On Thu, Aug 22, 2019 at 11:04 PM Leland L. Bahr <w5drc@...> wrote:

OK, Curt, you convinced me at our today's eyeball meeting.  I just ordered a Hilltopper 20.  Won't start it until I get my 40 meter Organic W8DIZ (Kits and Parts rig up and running.)  I still wish the Hilltopper keyer had a memory.  For me, it seems almost useless without it.  Most likely will use an outboard keyer with a memory so the internal one won't be used.  Why call CQ over and over again when a memory keyer with the CQ stored in it will do it for you.  Don't understand the reasoning for no memory when a chip costs around $5 with a memory.  Will also take your advice and use Vishey bypass caps.  (I threw the green ones away in the Organic 40 and used good quality Vishey there too.)  Other then that, I am looking forward to getting a Hilltopper 20 on the air.

Lee, w0vt, w5drc

On 8/18/2019 12:27 PM, Curt via Groups.Io wrote:
Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

Curt
 

Serial mods?  Where would those be detailed?  Also, I have found nothing describing any keyer functions programmed into the ATMEL.

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

Charles W. Powell
 

Lee,

With the serial mods you can use your favorite logging program to send CQ and follow QRG plus RIT.  May not work for you for portable, but I almost always take my computer anyway.

72,

Chas - NK8O
Greetings from Zurich!

On Aug 23, 2019, at 5:04 AM, Leland L. Bahr <w5drc@...> wrote:

OK, Curt, you convinced me at our today's eyeball meeting.  I just ordered a Hilltopper 20.  Won't start it until I get my 40 meter Organic W8DIZ (Kits and Parts rig up and running.)  I still wish the Hilltopper keyer had a memory.  For me, it seems almost useless without it.  Most likely will use an outboard keyer with a memory so the internal one won't be used.  Why call CQ over and over again when a memory keyer with the CQ stored in it will do it for you.  Don't understand the reasoning for no memory when a chip costs around $5 with a memory.  Will also take your advice and use Vishey bypass caps.  (I threw the green ones away in the Organic 40 and used good quality Vishey there too.)  Other then that, I am looking forward to getting a Hilltopper 20 on the air.

Lee, w0vt, w5drc

On 8/18/2019 12:27 PM, Curt via Groups.Io wrote:
Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

Leland L. Bahr
 

OK, Curt, you convinced me at our today's eyeball meeting.  I just ordered a Hilltopper 20.  Won't start it until I get my 40 meter Organic W8DIZ (Kits and Parts rig up and running.)  I still wish the Hilltopper keyer had a memory.  For me, it seems almost useless without it.  Most likely will use an outboard keyer with a memory so the internal one won't be used.  Why call CQ over and over again when a memory keyer with the CQ stored in it will do it for you.  Don't understand the reasoning for no memory when a chip costs around $5 with a memory.  Will also take your advice and use Vishey bypass caps.  (I threw the green ones away in the Organic 40 and used good quality Vishey there too.)  Other then that, I am looking forward to getting a Hilltopper 20 on the air.

Lee, w0vt, w5drc

On 8/18/2019 12:27 PM, Curt via Groups.Io wrote:
Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

Curt
 

Yes, I got all of the parts and the mod descriptions from Dave when ordered the kit and have marked up the BOM and manual accounting for those.

Curt KB5JO

Re: Hilltopper 20 Kit Excellent quality!

Bruce KS4V
 

Check the mods pages before you get too far.  There is an audio mod available from Dave Benson that makes a big difference.  Easier to do mod as you are building the rig.
Bruce. 
KS4V

-------- Original message --------
From: "Curt via Groups.Io" <rhulett1@...>
Date: 8/18/19 12:27 PM (GMT-06:00)
To: HilltopperKit@4SQRP.groups.io
Subject: [HilltopperKit] Hilltopper 20 Kit Excellent quality!

Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

Hilltopper 20 Kit Excellent quality!

Curt
 

Just want to thank whoever packs these kits with bagged assembly groups keyed to the instructions and the bom.  It makes assembly a real pleasure.  Someone spent a lot of time, effort, sweat thinking through and packaging this kit.  I am only on group 3, but the journey has been fun.  Any misnakes will be my fault :-o

Curt KB5JO

Re: 40 meter hilltopper little rf outpt.q

Ed Oxer, W8EO
 

Hi David, 

Tnx for the reply. 

On close examination I found that U4 was missing and looking in the parts box there it was. After a quick install, problem solved. 

I found that voltages were listed on the schematics at key points in the circuit. That would have been my next step. 

I'm using the 3d printed paddle I got from you at Dayton. It's working well. 

I'm putting together a Vectronics 40 mtr qrp xmtr to go with the ZZRX 40 that the Mich State Univ ARC built as a project 
this year. We also built a couple of QCX's. What an amazing rig that is. We combined the audio and radio clubs at W8SH
and attracted 13 newly licensed hams. They love building radio and audio stuff. This very important for engineering students. 

I'll look for you on the radio. 

Tnx and 73, 

Ed, W8EO
East Lansing

Re: 40 meter hilltopper little rf outpt.q

 

Ed,

 Sorry to hear about the low/no power out.

I would start with checking L5 and the BS170's.

After that try checking the LPF stage C47,48, 49, 50, 52 and L6 and 7 to see if anything has cold solder joints. Also check L5, 6 and 7 for continuity.

I am in the middle of build a HT20 (5th one) and once I get it done I can check voltages for you if not solved by then.

73

 David

  N8DAH

40 meter hilltopper little rf outpt.q

Ed Oxer, W8EO
 

Just finished 40 mtr htpr purchased at dayton. little outpt. can barely detect a signal on my 7300 scope. other than reduced audio gain in rx all working. any  suggestions? is there a voltage chart? tnx for any help. de W8EO

Re: Hilltopper 20 Receiver portion

Eric Holzapfel <ewholz@...>
 

Whoa!, hello Charles, thanks for the tip. This forum is a great resource for info. They had a big field day this 
past weekend, and my son's radio worked great - buy my little hilltoper no worky.  and my text above, typos! file=fine!!

I will give it a shot.
Thanks,
Eric

On Sun, Jun 23, 2019 at 7:42 PM Charles W. Powell via Groups.Io <doctorcwp=yahoo.com@groups.io> wrote:
Q1, the BS170, is the T/R mute FET.  I have had two of these that didn’t do what they were supposed to do.  Easy check: Remove Q1.  If the receiver comes to life, you have found the problem.  Replace it and you should be good to go.

72,

Chas - NK8O

On Jun 23, 2019, at 2:35 PM, Eric Holzapfel <ewholz@...> wrote:

Hello Group,
finished my hilltopper 20. But on first pwr up, blew the two (C29,C30) 100mf caps!
I replaced the caps, and the AtMega328 and the SE55? audio chip, but really can
hear no signals on the receiver. The unit seems to function, beeps freq, and transmits file.
Transmitted using a 20 m 1/2w dipole. The xmit sig sounds file a few hundred feet away.

But sadly the receiver seems not to work well. Are there any other parts that
you can suggest changing?

Thanks
eholz1
KN6CkC

Re: code will not compile - Hilltopper 20

Charles W. Powell
 

Good news.  Glad you found the problem.

72,

Chas - NK8O

On Jun 23, 2019, at 2:29 PM, Eric Holzapfel <ewholz@...> wrote:

All is well, bad Arduino , got new Arduino, and can program no problem

Re: Hilltopper 20 Receiver portion

Charles W. Powell
 

Q1, the BS170, is the T/R mute FET.  I have had two of these that didn’t do what they were supposed to do.  Easy check: Remove Q1.  If the receiver comes to life, you have found the problem.  Replace it and you should be good to go.

72,

Chas - NK8O

On Jun 23, 2019, at 2:35 PM, Eric Holzapfel <ewholz@...> wrote:

Hello Group,
finished my hilltopper 20. But on first pwr up, blew the two (C29,C30) 100mf caps!
I replaced the caps, and the AtMega328 and the SE55? audio chip, but really can
hear no signals on the receiver. The unit seems to function, beeps freq, and transmits file.
Transmitted using a 20 m 1/2w dipole. The xmit sig sounds file a few hundred feet away.

But sadly the receiver seems not to work well. Are there any other parts that
you can suggest changing?

Thanks
eholz1
KN6CkC