An interesting document, Mr n0ywb. Do you have one where the Icom
interface legends are readable ?. I can only see blobs and blurs.
A higher resolution copy would be useful.
73 Mike G8NXD
On 11/01/2023 01:08, N0YWB wrote:
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Outputs RA6 and RA7 complement each other -when one is low the
other is high. RA6 is asserted low to key the transceiver.? Input
"B" (start button, or asserted low by the transceiver) starts the
tuning cycle.? The ATU-100 behaves like Icom and LDG auto-tuners.?
The operation of the _START and _KEY signals is described on page
6 of? ?
 ??
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Re: atu-100 keeps reseting
Paul
1. on the ATU press one of the buttons which puts a fullstop at the end of the first line on the screen - Make sure there is no underscore which will put in the bypass mode
2. Turn the transmitter on - but make sure that the carrier is no more then 10 watts
3. The ATU should then tune - you should hear the relays clicking rapidly
4. Once the relay clicking has stopped then turn the carrier off
5. You should be then able to operate
73
Tony VK2IC
On Wed, Jan 11, 2023 at 6:18 PM Ton - PA0ARR < ton.solar@...> wrote: underscore is bypass, so no caps or coils connected.
dot is autotune, tunes if swr gets too large.?
73 Ton PA0ARR
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Re: atu-100 keeps reseting
underscore is bypass, so no caps or coils connected.
dot is autotune, tunes if swr gets too large.?
73 Ton PA0ARR
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Re: atu-100 keeps reseting
i am not quite getting this,So if after a good tuning cycle do i have to put it into the mode showing the underscore for it to keep using the combination of coils and caps used for a match,ie will it stop it from trying to retune until i change it or power off?,thanks m3vuv.
On Wed, Jan 11, 2023 at 5:39 AM Tony Magon < temagon@...> wrote: Paul
Please read thoroughly the pdf I sent you yesterday from page 6 onwards
73
Tony VK2IC
Well i found some more buttons and fitted with 100nf caps to ground,now i can get a period or underscore displayed,thing is what are those modes and how do i use them?,sorry for all the silly questions,all of my tuners are manual types so not au fait with auto atu's yet,thanks m3vuv.73.
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Re: atu-100 keeps reseting
Paul
Please read thoroughly the pdf I sent you yesterday from page 6 onwards
73
Tony VK2IC
Well i found some more buttons and fitted with 100nf caps to ground,now i can get a period or underscore displayed,thing is what are those modes and how do i use them?,sorry for all the silly questions,all of my tuners are manual types so not au fait with auto atu's yet,thanks m3vuv.73.
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Re: atu-100 keeps reseting
Well i found some more buttons and fitted with 100nf caps to ground,now i can get a period or underscore displayed,thing is what are those modes and how do i use them?,sorry for all the silly questions,all of my tuners are manual types so not au fait with auto atu's yet,thanks m3vuv.73.
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Outputs RA6 and RA7 complement each other -when one is low the other is high. RA6 is asserted low to key the transceiver.? Input "B" (start button, or asserted low by the transceiver) starts the tuning cycle.? The ATU-100 behaves like Icom and LDG auto-tuners.? The operation of the _START and _KEY signals is described on page 6 of? ?  ??
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Re: atu-100 keeps reseting
Is there a period (dot) on the screen? Maybe you have gotten it into Auto mode...
And you might try unsoldering those antennas on B1 and B2.?
What happens if you run, say, 10 watts into it??
On Tue, Jan 10, 2023, 6:21 PM Amanda Hambidge via <valvewhiz= [email protected]> wrote: I have had none of these problems with any of the ATUs I¡¯ve got 2x 100 and 1 100 modified for qrp, 2 ?ought in and one built from a kit.
M0DZO
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Re: atu-100 keeps reseting
I have had none of these problems with any of the ATUs I¡¯ve got 2x 100 and 1 100 modified for qrp, 2 ?ought in and one built from a kit.
M0DZO
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Re: atu-100 keeps reseting
Paul
There is no easy answer to your questions.?? Diagnosing problems remotely is difficult at best.
vk3pe
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?Paul
A7 goes high when tuning.? Then falls back to logic '0' (gnd potential)? A6 is the inverse.
vk3pe
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On Tue, Jan 10, 2023 at 08:23 PM, paul larner wrote:
do the RA6 and 7 pins go high or low when a tuning cycle comences,can the function of these be better explained and how to use and interface to a radio,ie to drive a fet to key the radio etc!,the manual doesent go into enough detail what these can do. 73 m3vuv
?Paul A7 goes high when tuning.? Then falls back to logic '0' (gnd potential) vk3pe
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Re: atu-100 keeps reseting
is nobody going to give me an answer to this then??,73 m3vuv.
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Sorry, who said anything about a cheap ATU?? And buying boards and various parts to follow the instructions that are available for an AMP Build isn't difficult.? I don't see any instructions or pre-built kits to build your own? that will support 2.5kw.
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Why would you risk a very expensive amp with a cheap ATU?
I fail to see the logic. If you have the capability to make a 2.5kw amp, I would have thought you would have the capability to make an ATU.
perhaps I¡¯m being too simplistic.
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Hi, I am in the process of building a 2.5kw PEP amplifier (legal limit here in Canada).? I am desperately looking for a way to build an automatic antenna tunder into it and stumbled across N7DDC kits.? Is there a way to upgrade these parts to support more power?? Anyone with ideas would be greatly appreciated.
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You'll need to respin the PWB to increase separation between critical traces. Plan to use vacuum relays and capacitors with at least 7.5 kV ratings for safety margin.
You're essentially looking at lightning in a box.
Al, K2ZN
Yes, but I am trying to build one that is 2500watts.. My new amp will be around 2.5kw... :-(
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Yes, but I am trying to build one that is 2500watts.. My new amp will be around 2.5kw... :-(
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hi John,
I found kits ATU1000 ¡ great chinese distributor¡ look at google or amazon!
73
Immo
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Hi, I am in the process of building a 2.5kw PEP amplifier (legal limit here in Canada).? I am desperately looking for a way to build an automatic antenna tunder into it and stumbled across N7DDC kits.? Is there a way to upgrade these parts to support more power?? Anyone with ideas would be greatly appreciated.
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The bypass caps need to be on the board. Otherwise, there is no point to adding them, as the switch wires are essentially antennas.
Al
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yes that should be ok -
73
Tony
its the box on my 320.see pic.
hi tony,can i put the decoupling caps at the switch end of the wires do you think?to fit them at the board end entails a total strip due to the way it fits the case.73 m3vuv.
On Tue, Jan 10, 2023 at 10:16 AM Tony Magon < temagon@...> wrote: Hi Paul
B1 switch is a spring loaded press button which puts the atu into automatic operation - it just needs one press which which will put the atu into automatic operation which will indicate by a dot at the end of the first line on the screen - if you press the button again it will go out of auto operation - all it is doing is quickly earthing the pin to ground - when in automatic mode you can then put the transmitter into tune mode with a max of 10 watts - the atu should then go thru its sequence to get the best swr. then turn the tune mode on? the tx off
B2 bypasses the atu - same type of button switch as B1
?the way you have the the b1 and b2 wires just dangling would indicate that you are getting rf into the PIC - You need to put a 100n capacitor to ground as per the diagram
I have two of these atus ready built - one of them did not have auto or bypass buttons - to set B1 into auto mode I had to touch the? PIC pin to ground to put it into auto
If you have any further questions - let me know your phone number and I can ring you - my mobile phone plan has free call to uk
73
Tony VK2IC
If you
i already have that but it doesent mention if the pins sink or source current and how many ma's etc,ie does a fet interface or bjt be needed for these to key a radio for example? ,i hope you understand where i am coming from? 73 m3vuv.
On Tue, Jan 10, 2023 at 9:52 AM Tony Magon < temagon@...> wrote: Pin Values
Hi Paul
Please find attached a pdf in regard to the operation of the two points B1 and B2 - Please read in regard to this from Page 6
Regards
Tony VK2IC ex ZL4DE
do the RA6 and 7 pins go high or low when a tuning cycle comences,can the function of these be better explained and how to use and interface to a radio,ie to drive a fet to key the radio etc!,the manual doesent go into enough detail what these can do. 73 m3vuv
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mike
N0YWB
Al Scanandoah
Immo, DL5KB