Re: Latching relays for the ATU-100?
Hi David,?
first of all thanks for all of your work on these great tuners, when I got my kit I was sceptical, but once I got the board finished and tested it that vanished.?
Will it be possible to retro fit latching relays and upgrade the firmware on a non latching unit?
Regards
Amanda M0DZO
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Re: Latching relays for the ATU-100?
The reason I was asking about latching relays is this Chinese built ATU-100 with inbuilt battery which I bought off eBay, ?on opening it up I found that the pillars holding the board were glued in to the case which I remedied and also the toroids were standing proud of the board which I remedied. The binocular coils were wound with 5 turns.
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Re: Latching relays for the ATU-100?
Thanks - since many qrp rigs are in the field powered by a battery, latching relays would make more sense.
It's always nice to learn something new in ham radio.
73 - Bill
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This is the led , I am hoping it will switch to the other one, Dave
On Mon, 19 Dec 2022, 14:57 john, < john@...> wrote: Would anyone have on the bench a pre-built ATU-100 that uses the small circuit board labelled J5019?
I am after the voltages for;
The feed to the main board with the relays on
The feed to the battery when on charge via USB please.?
thanks
John
M0VAZ.
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Hi John My mistake is that the board takes 0.443ma so less then 0.5 of a ma, with out a load from the output side of the board, so it is still a drain on the battery, but not so bad, My battery is now reading 4.215V the usb is still plugged in, and it is now taking 230ma at 5.28V from the usb power supply,? when It started charging it was taking 1amp, I don't know if it changes led when it is fully charged, But it is still on the same led,as when I started? Thanks Dave?
On Mon, 19 Dec 2022, 14:57 john, < john@...> wrote: Would anyone have on the bench a pre-built ATU-100 that uses the small circuit board labelled J5019?
I am after the voltages for;
The feed to the main board with the relays on
The feed to the battery when on charge via USB please.?
thanks
John
M0VAZ.
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Firmware runs great! David :-)
Auto tune disabled, works like a charm now :-)
Can't wait for the final release.
?
Thanks
Bjorn - PD5DJ
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Hi again John I am just charging up the battery now so I will see what the max charge is, Like I say it should not be over 4.2V, Thanks Dave?
On Mon, 19 Dec 2022, 14:57 john, < john@...> wrote: Would anyone have on the bench a pre-built ATU-100 that uses the small circuit board labelled J5019?
I am after the voltages for;
The feed to the main board with the relays on
The feed to the battery when on charge via USB please.?
thanks
John
M0VAZ.
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Hi John I have just received this board today, When the usb is plugged in Charging max battery voltage should not go above 4.2V when fully charged, Also the voltage output can be set by the small pot on the board, the tuner can run from 10-14V , so I am seeing mine to 11V as it is only the relays that take the 10-14v, So the higher you set the output from the board the more current it will take, Also I have just tested the current with no load on the output and only the battery connected and the board is still taking 450ma from the battery, so this is why the tuner battery goes flat when it is not used, so you do want to put a switch between the battery and the board, But that would mean that switch would have to be on for charging unless you make up circuit that switches in the battery for charging when the usb is plugged in, I hope?this helps Thanks Dave 2E0DMB
On Mon, 19 Dec 2022, 14:57 john, < john@...> wrote: Would anyone have on the bench a pre-built ATU-100 that uses the small circuit board labelled J5019?
I am after the voltages for;
The feed to the main board with the relays on
The feed to the battery when on charge via USB please.?
thanks
John
M0VAZ.
|
Would anyone have on the bench a pre-built ATU-100 that uses the small circuit board labelled J5019?
I am after the voltages for;
The feed to the main board with the relays on
The feed to the battery when on charge via USB please.?
thanks
John
M0VAZ.
|
Re: Latching relays for the ATU-100?
With a latching relay, no power is needed to hold its position, power is only needed to CHANGE its position. With a non-latching relay, power much be applied continuously to hold the relays position. So for low power operation, latching would be best.
Max?
On Monday, December 19, 2022, 08:43:22 AM CST, Bill <sloper1@...> wrote:
Please enlighten me as to why latching relays are better and what is the difference.
I am a relatively new ham.
Thanks - Bill
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Re: Latching relays for the ATU-100?
Hi Bill? When the tuner has done the tune , it may be taking Upto around 270ma, as it needs to hold the relays, by still powering the coil, but with latching ones, once tuned they hold by them self's, Taking no current, but you do have to power them again to un-latch them, Dave?
Please enlighten me as to why latching relays are better and what is the difference.
I am a relatively new ham.
Thanks - Bill
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Re: Latching relays for the ATU-100?
Please enlighten me as to why latching relays are better and what is the difference.
I am a relatively new ham.
Thanks - Bill
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Re: Latching relays for the ATU-100?
Hi David That sounds great, Thanks Dave 2E0DMB
On Mon, 19 Dec 2022, 14:31 David Fainitski, < rolin791@...> wrote: Hi, Amanda
There is a special atu 100 version with latching relays. I will present it soon when I find a time.?
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Re: Latching relays for the ATU-100?
Thats good to know, David. I look forward to seeing it.
73 Mike
On 19/12/2022 14:31, David Fainitski
wrote:
toggle quoted message
Show quoted text
Hi, Amanda
There is a special atu 100 version with latching relays. I
will present it soon when I find a time.?
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Re: Latching relays for the ATU-100?
Hi, Amanda
There is a special atu 100 version with latching relays. I will present it soon when I find a time.?
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Re: Latching relays for the ATU-100?
There are Latching relays that are a 'drop-in' for the existing
non-latching relays, BUT the software would need to be re-written
and the hardware around them would have to be changed to drive
them. Sadly, its a non-starter for most of us . I believe the
ATU-10 already uses latching relays, perhaps an easier route would
be to replace the tuning components in an ATU-10 to accommodate
100w.
On 19/12/2022 05:28, Amanda Hambidge
via groups.io wrote:
toggle quoted message
Show quoted text
Hi all,
Is there a latching relay that will replace the non latching
types in the ATU-100?
?
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Latching relays for the ATU-100?
Hi all,
Is there a latching relay that will replace the non latching types in the ATU-100?
?
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Hi, All
Version 1.6.3 here, it is Release Candidate
Checksumm calculator inside the archive
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Re: Have SMA kit. Possible to add/solder additional SO239 jack to the ¡®out/ant¡¯.
#atu-100
Goal is to:
-have SMA and also SO239 connector to choose from for the antenna side
-avoid adapters
-use the extra so239 connector that came with my kit?
-use a standard so239 cable to my so239 9:1 unun
-reduce costs buying more cables/adapters
-have ready to go option between SMA and SO239 in the field and for later antennas, standardized small kit
-initially for QRP, so yes avoid any loss using adapters.
?
Thanks!
?
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Re: Have SMA kit. Possible to add/solder additional SO239 jack to the ¡®out/ant¡¯.
#atu-100
Not sure if the goal is a change in the physical connections from sma to either bnc or pl259. If so, why not an adapter. Are they too lossy?
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mike