Groups

Hardrock-500 Technical Forum

Contact owners and managers

1–30 of 97

Welcome to the Hardrock-500 technical forum. Here we will explore all of the technical issue of building, testing and operating a Hardrock-500 amplifier. If you want to join, send the join request but also shoot an email to Support @ HobbyPCB.com. Google used to send me an email when the request was sent but they don't anymore so I have to find the pending requests when I visit the group.

0 selected

jcve...@gmail.com

Aug 31

Important FW Notice

This is reposted from an email I received: Hi Jim I found a serious bug in my previous Ver.6.xx

unread,

Important FW Notice

This is reposted from an email I received: Hi Jim I found a serious bug in my previous Ver.6.xx

Aug 31

Geert Jan PE1HZG

Aug 25

Who is (not) using the HR500-bootloader tool?

Hi all, In case you have not seen it, Joe VE7VXO has updated his HR500 code and we're now on

unread,

Who is (not) using the HR500-bootloader tool?

Hi all, In case you have not seen it, Joe VE7VXO has updated his HR500 code and we're now on

Aug 25

Maurizio Brameri, … Andrew Catanzaro9

Aug 13

Hi Andy, it was not my intention to put Joe's firmware under accuse. I was only surprised by the

unread,

Hi Andy, it was not my intention to put Joe's firmware under accuse. I was only surprised by the

Aug 13

Maurizio Brameri, jcve...@gmail.com4

Aug 12

Firmware version 3.4b

Hi, I am in touch with Joe who prepared a new beta firmware with some cosmetic corrections and I will

unread,

Firmware version 3.4b

Hi, I am in touch with Joe who prepared a new beta firmware with some cosmetic corrections and I will

Aug 12

Geert Jan PE1HZG

Jul 30

HR500 hardware modifications

While the population of HR500 users will never grow because kits have sold out, perhaps it makes

unread,

HR500 hardware modifications

While the population of HR500 users will never grow because kits have sold out, perhaps it makes

Jul 30

Andrew Catanzaro, … Geert Jan PE1HZG4

Jul 30

PTT dropouts and metering issues

"Is it compatible with a HR500 with ATU unit" - YES, at least, it works for me. What I did,

unread,

PTT dropouts and metering issues

"Is it compatible with a HR500 with ATU unit" - YES, at least, it works for me. What I did,

Jul 30

Robert Cheek, … AC1I4

Mar 30

I just thought I would throw this out there: A couple of years ago several of us suffered from blown

unread,

I just thought I would throw this out there: A couple of years ago several of us suffered from blown

Mar 30

Mike Saeger, jcve...@gmail.com3

Jan 31

Hardrock SWR Issue

Unbelievable! It was an EXTERNAL cable issue. I replaced the cable and SWR issue is GONE! Full drive

unread,

Hardrock SWR Issue

Unbelievable! It was an EXTERNAL cable issue. I replaced the cable and SWR issue is GONE! Full drive

Jan 31

ricardo caetano

Jan 31

Any PCB available? - trying to build a hardrock500

Hi all, I know that it has been discontinued. I missed on it unfortunately. But anyone has one extra

unread,

Any PCB available? - trying to build a hardrock500

Hi all, I know that it has been discontinued. I missed on it unfortunately. But anyone has one extra

Jan 31

AC1I, … Andrew Catanzaro17

Jan 30

AMP Relay (Y301) PN

Yes, I've experienced the HR 500 dropping out between CW words and not picking up for a second or

unread,

AMP Relay (Y301) PN

Yes, I've experienced the HR 500 dropping out between CW words and not picking up for a second or

Jan 30

K5RHD Randy Diddel, jcve...@gmail.com6

Jan 23

Bad Hardrock 500 Power Board?

Tha amp is spoken for and has been SOLD. /randy On Tuesday, January 21, 2025 at 2:54:22 PM UTC-7

unread,

Bad Hardrock 500 Power Board?

Tha amp is spoken for and has been SOLD. /randy On Tuesday, January 21, 2025 at 2:54:22 PM UTC-7

Jan 23

N1IG - Anthony, … jcve...@gmail.com9

Jan 21

HR500 & IC705 tuning power output issue

I may be confusing the IC705 with the Hardplace Branch. I found some release notes for the 4.2A

unread,

HR500 & IC705 tuning power output issue

I may be confusing the IC705 with the Hardplace Branch. I found some release notes for the 4.2A

Jan 21

Geert Jan PE1HZG, N1IG - Anthony2

Jan 20

How I broke (and repaired) my HR500

How much power were you using? On Thursday, November 21, 2024 at 8:11:58 AM UTC-5 Geert Jan PE1HZG

unread,

How I broke (and repaired) my HR500

How much power were you using? On Thursday, November 21, 2024 at 8:11:58 AM UTC-5 Geert Jan PE1HZG

Jan 20

11/3/24

I Love my HR-500 ! :)

Is anyone else using theirs with a Hermes Lite 2, or Square SDR? Anthony - N1IG

unread,

I Love my HR-500 ! :)

Is anyone else using theirs with a Hermes Lite 2, or Square SDR? Anthony - N1IG

11/3/24

Maurizio Brameri, jcve...@gmail.com7

7/11/24

New interface for IC-705

I have archival copies of all of the Arduino versions, so yes I can send you the original code. 73,

unread,

New interface for IC-705

I have archival copies of all of the Arduino versions, so yes I can send you the original code. 73,

7/11/24

N1IG - Anthony, jcve...@gmail.com3

6/10/24

Upgrading fans / adding cooling

I had actually been thinking about tapping the 2A that is available for powering a radio, But then

unread,

Upgrading fans / adding cooling

I had actually been thinking about tapping the 2A that is available for powering a radio, But then

6/10/24

N1IG - Anthony, … Geert Jan PE1HZG20

5/18/24

Hi Gert, and thank you for the email. Thankfully i live not far from Jim, and took it to him to go

unread,

Hi Gert, and thank you for the email. Thankfully i live not far from Jim, and took it to him to go

5/18/24

Mike Saeger, … jcve...@gmail.com8

5/9/24

Hardrock-500 Discontinued?

Hi Andy, I'm glad you are having a good time with your amp, I usually only hear about bad times.

unread,

Hardrock-500 Discontinued?

Hi Andy, I'm glad you are having a good time with your amp, I usually only hear about bad times.

5/9/24

4/19/24

Implementing Pure Signal

I have ordered a HR500 as well as the parts needed to use Pure Signal. Has anyone else here used the

unread,

Implementing Pure Signal

I have ordered a HR500 as well as the parts needed to use Pure Signal. Has anyone else here used the

4/19/24

Luca, … N1IG - Anthony3

4/13/24

HPSDR PURE SIGNAL

Good morning, Did you configure your HR500 for Pure Signal? I am interested in your results, and what

unread,

HPSDR PURE SIGNAL

Good morning, Did you configure your HR500 for Pure Signal? I am interested in your results, and what

4/13/24

K5RHD Randy Diddel, … Robert Herendeen8

1/23/24

Intermittent PTT relay in HR500

Hi, It is set to NOR (Normal) which I think is 5ms?? /randy On Tuesday, January 23, 2024 at 12:00:45

unread,

Intermittent PTT relay in HR500

Hi, It is set to NOR (Normal) which I think is 5ms?? /randy On Tuesday, January 23, 2024 at 12:00:45

1/23/24

Luca, Mike Saeger2

1/22/24

Apache Labs ANAN Settings

I'm using the Hardrock 500 with the predecessor to the Apache Labs transceivers -- the TAPR

unread,

Apache Labs ANAN Settings

I'm using the Hardrock 500 with the predecessor to the Apache Labs transceivers -- the TAPR

1/22/24

Geert Jan PE1HZG, jcve...@gmail.com2

10/27/23

HR500 relays wetting current?

Hi Geert, We have not seen anything relates to 'wetting current' with these relays. You

unread,

HR500 relays wetting current?

Hi Geert, We have not seen anything relates to 'wetting current' with these relays. You

10/27/23

Mike Saeger, … jcve...@gmail.com4

8/29/23

Installed new VRF2933 - Can't adjust bias

The Chinese VRF2933s that I ordered from eBay were cheap but shorted -- reason I couldn't adjust

unread,

Installed new VRF2933 - Can't adjust bias

The Chinese VRF2933s that I ordered from eBay were cheap but shorted -- reason I couldn't adjust

8/29/23

K5RHD Randy Diddel, jcve...@gmail.com2

7/26/23

Hi Randy, The CT-62 appears to be designed to connect the FT817/818 to a RS-232 port on a PC, not a

unread,

Hi Randy, The CT-62 appears to be designed to connect the FT817/818 to a RS-232 port on a PC, not a

7/26/23

Geert Jan PE1HZG, … Mike Saeger7

6/10/23

Check the mounting screws of your transistors!

My transistors blew and when I went to remove them, I discovered both screws were loose. I was pretty

unread,

Check the mounting screws of your transistors!

My transistors blew and when I went to remove them, I discovered both screws were loose. I was pretty

6/10/23

Mike Saeger, … AC1KM3

6/10/23

Supplier for D1 & D2 1N4148 on Amplifier Board?

MMBD914LT1G If you have a Mouser account, upload the BOM, and it make finding parts easy. On Friday,

unread,

Supplier for D1 & D2 1N4148 on Amplifier Board?

MMBD914LT1G If you have a Mouser account, upload the BOM, and it make finding parts easy. On Friday,

6/10/23

Maurizio Brameri, jcve...@gmail.com5

5/26/23

Hardrock-500 LPF

here my measures of few minutes ago: 160 m 300 W with 2.5 W in (OK) 80 m 480 W with 4 W in (OK) 60 m

unread,

Hardrock-500 LPF

here my measures of few minutes ago: 160 m 300 W with 2.5 W in (OK) 80 m 480 W with 4 W in (OK) 60 m

5/26/23

Maurizio Brameri, jcve...@gmail.com3

5/26/23

Pictures of transformers on final module

It is RG-316 but the 25 ohm version. It is printed on the cable. I hope it is true. Il giorno giovedì

unread,

Pictures of transformers on final module

It is RG-316 but the 25 ohm version. It is printed on the cable. I hope it is true. Il giorno giovedì

5/26/23

Mike Saeger, … Maurizio Brameri4

5/25/23

RF Getting into Temp line on 17m

Hi, I put some ferrite cores around the power supply cables (red and black ones) and in long flat

unread,

RF Getting into Temp line on 17m

Hi, I put some ferrite cores around the power supply cables (red and black ones) and in long flat

5/25/23

Search

Clear search

Close search

Google apps

Main menu