An interesting aircraft receiver

[BillC]

This image shows most of the function of the Collins R-105A/ARR-15 as a block diagram with both signal paths and mechanical paths.

 

[VK3YNV]

Thanks for posting that Bill, very interesting receiver.

 

[vk3vsm]

interesting , thanks for the share

 

[BillC]

Assembling the ten stop shaft positioning device for the autotune.

 

[vk3tjs]

Mechanical marvel, only Bill has the determination, patience and skill to put it all together. Amazing!
Thank you for bringing it to the club for us to appreciate.

 

[BillC]

 

[BillC]

It is a real challenge to get this one working Jac. I hope soon to be able to demo the full autotune motor driven channel selecting process. I need to construct a new power supply to provide 26.5 volts at about 6 amps DC. as well as the B+ of around 220 volts DC. Thanks for the chat.

 

[vk3tjs]

Steve VK3DP in Mooroopna has Collins AR13 with autotune working, he is using it at times on Bottle shop net (on AM).

 

[vk3tjs]

It is a real challenge to get this one working Jac. I hope soon to be able to demo the full autotune motor driven channel selecting process. I need to construct a new power supply to provide 26.5 volts at about 6 amps DC. as well as the B+ of around 220 volts DC. Thanks for the chat.

There was a power supply for Collins advertised on VKHam.

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vkclassifieds.net.au

 

[BillC]

Thanks, I think I have enough parts here to do the job. I have just put an order in for more time, so when that turns up I might start on the PSU. cheers.

 

[vk3vsm]

thanks for bringing it along , what a beast of a machine

 

[VK3YNV]

Great stuff Bill, it's a amazing achievment to reverse engineer the whole machine and re-assemble it in working order.

I also placed an order for more time as well, but I think it got lost in shipping. If it turns up, I'll lend you some.

 

[BillC]

Thanks Ray, I enjoy the challenge of this sort of gear, it is so beautifully engineered and somehow needs to be respected. I hope I can get it to autotune one day soon. One of the challenges when aligning the gears and shafts was the limited space to loosen and adjust and re-tighten the bristol spline grub screws , they would often try to seat back into a previous mark in the shaft and that position might not have been correct . Collins solved this problem in later equipment by using circumferential clamps and fingered bosses on the gears, so no grub screw marking on the shafts. Just a small detail but that makes a huge difference when you have to align a multi-function assembly.