Date   

Re: HT20 Alive!

Curt
 

My results are: Fresh 9V battery ( 9.3VDC) - 600 mW; 8xAA fresh (11.3 VDC) - 4W; 7AH gelcel (12.2 VDC) - 6W; Shack 20 amp supply ( 13.8 VDC) - 8W.

So guess the 8xAA will fit need without stressing the finals.  The 8xAA provides 2000 mAH.

72, Curt KB5JO


Re: HT20 Alive!

Dave Benson
 

Curt-

Thanks for your kind words. :-)

The one thing I've seen with the small 3S batteries intended for RC use-  they don't tolerate a complete discharge.
Twice now, I've accidentally left them powering a rig overnight (in receive) and they were dead.  There's just not room
in the batteries for cell balance and over-discharging protection circuits.  The chargers balk at trying to recharge them,
and I've thrown away two of those batteries so far. 

The LiFePO4 batteries, by contrast, have worked flawlessly for me. 

73- Dave


On Tue, Aug 27, 2019 at 9:03 AM Curt via Groups.Io <rhulett1=consolidated.net@groups.io> wrote:
I imagine the 3s Lipo would be great for field portable and own some of those for RC model airplanes, but the furthest get from home with ham radio is the back patio.  Will try out the 9V battery and post my results.  Used that for an ATS-3B years ago, with nearly same transmitter chain from wilds of northern Canada, put out 1W for lot of QSOs.

This little radio is a real jewel IMHO.  Great design, great assembly manual, great packaging, wonderful performance.

Curt KB5JO


Re: HT20 Alive!

Curt
 

I imagine the 3s Lipo would be great for field portable and own some of those for RC model airplanes, but the furthest get from home with ham radio is the back patio.  Will try out the 9V battery and post my results.  Used that for an ATS-3B years ago, with nearly same transmitter chain from wilds of northern Canada, put out 1W for lot of QSOs.

This little radio is a real jewel IMHO.  Great design, great assembly manual, great packaging, wonderful performance.

Curt KB5JO


Re: HT20 Alive!

Dave Benson
 

Curt-

A 9V supply will work, although a consumer-grade 9V battery may not last long- its internal resistance will increase pretty quickly as the cells discharge.  A limiting factor on the minimum supply voltage may be the dropout voltage on the 5V regulator- a supply voltage in the 6-7 volt range.  Even then, it may be a graceful degradation.

I've never tried testing it. Let us know how you make out.

BTW- I've used a three-cell (3S) Li-Ion battery quite a bit for portable applications- they're rated at 11.1V nominal and work very well with the Hilltopper.  Mine's a 1.3 Amp-hour battery weighing only 3 ounces.

73- Dave, K1SWL



On Mon, Aug 26, 2019 at 11:26 PM Charles W. Powell via Groups.Io <doctorcwp=yahoo.com@groups.io> wrote:
Typically the value of the electrolytic caps and the heat capacity of the 5v regulators is the limiting factor.  I use 14.1 volts often without any problems.

72,

Chas - NK8O

On Aug 27, 2019, at 2:38 AM, Curt via Groups.Io <rhulett1@...> wrote:

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 Alive!

Charles W. Powell
 

Typically the value of the electrolytic caps and the heat capacity of the 5v regulators is the limiting factor.  I use 14.1 volts often without any problems.

72,

Chas - NK8O

On Aug 27, 2019, at 2:38 AM, Curt via Groups.Io <rhulett1@...> wrote:

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

Curt
 

With 12.5 ohms, Elsie output looks great.  I had forgotten about low FET output impedance.

Curt KB5JO


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