John Tee Posted April 25, 2021 Share Posted April 25, 2021 Firstly, apologies for the underlining, didn't select it but can't get rid of it - tried hitting the underline symbol - no effect. How many older modellers remember these servos? The grey one has a plug that Harry Brooks used back in the sixties. I didn't use the Climax ones as they are waterproof so must have acquired from somewhere but I did use the normal ones. Modern Futaba and midi servo as size comparison. Also found a box of single channel gear and a Remcon reed Tx. Didn't get rid of too much but things are much tidier now. Quote Link to comment Share on other sites More sharing options...
Steven Curry Posted April 25, 2021 Share Posted April 25, 2021 I still have my original Harry Brooks 4 channel system (built from his kit) with the grey servos. Doubt it will ever see action again ?? Quote Link to comment Share on other sites More sharing options...
Simon Chaddock Posted May 1, 2021 Share Posted May 1, 2021 A Futaba 5 wire servo with linear movement. Massive and heavy. Part of a Ripmax/Futaba Digimax 5 channel set. The slightly alarming feature was the Tx had a mains transformer in it so you plugged in a 240V mains supply to charge its battery! Thoughtfully the same transformer could also charge the Rx DEAC. Remember them? Quote Link to comment Share on other sites More sharing options...
John Tee Posted May 1, 2021 Author Share Posted May 1, 2021 (edited) Was it the Orbit PS3 that could be changed from linear to rotary output by changing the servo case top? John Edited May 1, 2021 by John Tee bad spelling Quote Link to comment Share on other sites More sharing options...
Bob Cotsford Posted May 1, 2021 Share Posted May 1, 2021 Didn't SLEC do servo cases with linear and rotary output options that were used by a variety of manufacturers and kits? I'm sure Skyleader offered a similar servo. My Horizon 8 also had the mains transformer in the tx case with a flylead for charging the rx DEAC packs. Quote Link to comment Share on other sites More sharing options...
GrumpyGnome Posted May 2, 2021 Share Posted May 2, 2021 Skyleader definitely had linear servos - if I recall my first 4 channel set came with 2 rotary and 2 linear servos. Quote Link to comment Share on other sites More sharing options...
Kevin Fairgrieve Posted May 2, 2021 Share Posted May 2, 2021 I have these from "back in the day!" I have many times contemplated putting a modern plug on one to see if they still work. Quote Link to comment Share on other sites More sharing options...
Peter Christy Posted May 2, 2021 Share Posted May 2, 2021 Those Harry Brooks servos originated with Micro-Avionics in the USA, IIRC. Manufacture was then taken over by Brand Microprop in Germany (I think) which is where Sprengbrook got them from. The grey ones were 4-wire servos with a discrete amplifier, and needed a centre-tapped battery pack. The red ones used an IC amp and only needed 3-wires (ne centre tap). I have a set of each, along with the receivers and Tx. The Tx still works well, and I have no doubt the Rxs and servos would if I provided them with the appropriate batteries. The HB Precision radio was basically a kit built Sprengbrook. Kits were a way of avoiding Purchase Tax (predecessor to VAT, and a LOT simpler!). If something was "educational" (ie: a kit), it was tax exempt. You could even buy a Lotus Elan as a kit and assemble it yourself, making a substantial saving in cost! Quote Link to comment Share on other sites More sharing options...
Wookman Posted May 6, 2021 Share Posted May 6, 2021 On 02/05/2021 at 08:17, Kevin Fairgrieve said: I have these from "back in the day!" I have many times contemplated putting a modern plug on one to see if they still work. The SRC1 servos had interchangeable top casing moulding to change from linear to rotary. Just undo the case screws and swap the tops over. In linear configuration they had very limited throw but it was nice to have the versatility. The conical spline for the rotary output was ok until the screw comes loose. It is exciting when it happens on a single central aileron servo! Quote Link to comment Share on other sites More sharing options...
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