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Steve/G4MJW All Messages By This Member #3068 I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?
Karl Heinz Kremer - K5KHK All Messages By This Member #3069 Steve, you can reprogram the EEPROM section of the ATU and write the value 01 into location 02 and that will permanently put the device into auto mode - assuming you don’t have any buttons to override the mode.? de Karl Heinz - K5KHK
Steve/G4MJW All Messages By This Member #3070 Many thanks for that Karl. I have done it before when I fitted an ATU-100 in the feed box on my Cobweb Aerial. I have a Pickit but forgotten how I did it! I touched the B1 pin to ground and it is working automatically now. I'm using this seco d ATU-100 with a new Icom IC-705 and it won't set off the tuner with 10 wTts. It does work on my IC-7300 but needs 12-13 Watts. So, I'm planning on doing the "Low Power" mod and will do the permanent Auto mod at same time. Steve/G4MJW?
mike All Messages By This Member #3091 开云体育 I have an ATU-100 in auto mode, remotely mounted with a 4:1 balun for a Doublet. With 10 watts continuous carrier into the ATU it finds a 1.1:1 match and then about 5 seconds later retunes to the 1.1:1 match, it cycles this continuously while there is rf present. Any ideas why. On 24/05/2024 18:59, Steve Carey via groups.io wrote: toggle quoted message Show quoted text I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?
Mike N2MS All Messages By This Member #3092 RF on the power supply line? I would wrap a couple of turns of the power lead through a 31 mix ferrite. ? Mike N2MS toggle quoted message Show quoted text On 06/20/2024 2:58 AM EDT mike <pencoys@...> wrote: ? ? I have an ATU-100 in auto mode, remotely mounted with a 4:1 balun for a Doublet. With 10 watts continuous carrier into the ATU it finds a 1.1:1 match and then about 5 seconds later retunes to the 1.1:1 match, it cycles this continuously while there is rf present. Any ideas why. On 24/05/2024 18:59, Steve Carey via groups.io wrote: I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?
mike All Messages By This Member #3093 开云体育 Good idea, but I should have said. The power is via a DC Tap over the coax. all well decoupled and as used on other ATU-100 installations without issues. On 20/06/2024 12:07, Mike N2MS via groups.io wrote: toggle quoted message Show quoted text RF on the power supply line? I would wrap a couple of turns of the power lead through a 31 mix ferrite. ? Mike N2MS On 06/20/2024 2:58 AM EDT mike <pencoys@...> wrote: ? ? I have an ATU-100 in auto mode, remotely mounted with a 4:1 balun for a Doublet. With 10 watts continuous carrier into the ATU it finds a 1.1:1 match and then about 5 seconds later retunes to the 1.1:1 match, it cycles this continuously while there is rf present. Any ideas why. On 24/05/2024 18:59, Steve Carey via groups.io wrote: I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?
Mike N2MS All Messages By This Member #3094 To verify can you temporarily power the ATU100 via a battery and see it it still retunes? ? Mike N2MS toggle quoted message Show quoted text On 06/20/2024 7:24 AM EDT mike <pencoys@...> wrote: ? ? Good idea, but I should have said. The power is via a DC Tap over the coax. all well decoupled and as used on other ATU-100 installations without issues. On 20/06/2024 12:07, Mike N2MS via groups.io wrote: RF on the power supply line? I would wrap a couple of turns of the power lead through a 31 mix ferrite. ? Mike N2MS On 06/20/2024 2:58 AM EDT mike <pencoys@...> wrote: ? ? I have an ATU-100 in auto mode, remotely mounted with a 4:1 balun for a Doublet. With 10 watts continuous carrier into the ATU it finds a 1.1:1 match and then about 5 seconds later retunes to the 1.1:1 match, it cycles this continuously while there is rf present. Any ideas why. On 24/05/2024 18:59, Steve Carey via groups.io wrote: I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?
Paulo de Tarso M. Bastos All Messages By This Member #3097 Hi Steve, I've had an issue similar to yours: the unit was in an infinite loop trying to get the match. I've found 2 defective diodes that are in parallel with relays coils (my version is ATU150 - handles 150 W, which is not exactly equal to ATU100), and one transistor , 2n7002 also defective: current leakage from emitter to collector. So, your problem may be also caused by a bad relay contact closure or opening. The cause can be defective diodes or capacitor in parallel with relay coils, and also a driving transistor. I would also check the cell 31 value: I have increased mine from 15 to 25, since the relays on my ATU150 are bigger than the original ones on ATU100. Goof Luck, Paulo de Tarso Bastos - PY1JDX Em qui., 20 de jun. de 2024 às 03:58, mike via <pencoys=[email protected]> escreveu: toggle quoted message Show quoted text I have an ATU-100 in auto mode, remotely mounted with a 4:1 balun for a Doublet. With 10 watts continuous carrier into the ATU it finds a 1.1:1 match and then about 5 seconds later retunes to the 1.1:1 match, it cycles this continuously while there is rf present. Any ideas why. On 24/05/2024 18:59, Steve Carey via wrote: I want to setup my ATU-100 in a waterproof box at the base of my 111ft (34mtrs) Inverted "L" Long Wire. I gather that if I momentarily ground RB1 just once to will push it into Automatic mode and save to memory.? Question . . . Is RB1 the pad on the underside of the PCB, marked B1 alongside B2, A7 and A6 ? Hopefully, that simple. Many thanks Steve/G4MJW?

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