KO Digiace 4 from 1969 (conversion)
Posted: 27 May 2019, 01:05
I've been meaning to update my old 27mhz KO Digiace for some time. This set is a bit nostalgic for me as at 15 years old I had a 5am milk-round and saved up my wages for months to buy it, and also because it brought some competition success (slope aerobatics & pylon racing) back in 1970. This is the second conversion I've done using the DigiSpark and the 4-channel encoder, the first being the Multplex Pico-line that I used as a prototype. As a 4-channel propo encoder it needs all the DigiSpark's I/O, achieved using the fuse programmer.
By way of a change from 2.4g this one uses a Hitec 35mhz module (from Profi) on my lucky channel of 76.
Looking into the back of the set, the RF module is top left and the DigiSpark encoder top right.
I've not fitted the S/C button as I feel it would spoil what was a very 'plain' set.
I was very happy with Corona synthesised receivers back in the 35mhz days so thats what I'm using. I might fit the Corona inside the original Digiace receiver case, not sure. I have a few so might do that 'for show' but fly it with bare receivers.
I find the comparison of old and new electronics really amusing - the old Digiace board had no facilities at all, not even servo reversing. It was the full planform of the transmitter, whereas its replacement is 3/4" square!
The tiny white thing top-right is the new encoder!
The meter reads just right with a fixed 100k in series, as long as it moves I'm not fussed about expanded scales or anything. From outside the set looks completely standard, with no extra buttons, switches or LEDs behind the meter, with just the lovely original satin steel finish.
The finished set works great, I've been flying it in the old EasyStar, I'd forgotten how much fun that is being hugely overpowered, with vertical climbs and long glides a battery can last well over an hour.
The DigiAce feels no different to how I remember it used to be, but with a few extra bells & whistles and hopefully a much better proposition on 35 rather than 27mhz
Cheers
Phil
Edit: The revamped DigiAce has flown many, many times since, and I've recently updated the firmware to the current V2 with the dual maps and throttle soft-lock alarm. Love this set!
By way of a change from 2.4g this one uses a Hitec 35mhz module (from Profi) on my lucky channel of 76.
Looking into the back of the set, the RF module is top left and the DigiSpark encoder top right.
I've not fitted the S/C button as I feel it would spoil what was a very 'plain' set.
I was very happy with Corona synthesised receivers back in the 35mhz days so thats what I'm using. I might fit the Corona inside the original Digiace receiver case, not sure. I have a few so might do that 'for show' but fly it with bare receivers.
I find the comparison of old and new electronics really amusing - the old Digiace board had no facilities at all, not even servo reversing. It was the full planform of the transmitter, whereas its replacement is 3/4" square!
The tiny white thing top-right is the new encoder!
The meter reads just right with a fixed 100k in series, as long as it moves I'm not fussed about expanded scales or anything. From outside the set looks completely standard, with no extra buttons, switches or LEDs behind the meter, with just the lovely original satin steel finish.
The finished set works great, I've been flying it in the old EasyStar, I'd forgotten how much fun that is being hugely overpowered, with vertical climbs and long glides a battery can last well over an hour.
The DigiAce feels no different to how I remember it used to be, but with a few extra bells & whistles and hopefully a much better proposition on 35 rather than 27mhz

Cheers
Phil
Edit: The revamped DigiAce has flown many, many times since, and I've recently updated the firmware to the current V2 with the dual maps and throttle soft-lock alarm. Love this set!