askJohn

Double up, another use for a Y-harness!

by | Saturday, March 20, 2021 |
Reverse your thinking regarding Y-harnesses!

Most only think of the Y-harness for connecting two servos to one channel. Thing is, this handy little accessory is useful the other way around, also.

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Low buck trick to stretch mask use

by | Tuesday, March 16, 2021 |
Waste not, want not, or how a spritz of IPA can save a mask for reuse

In the vein of a penny saved is a penny earned, this brief how-to shows you an easy way for making your mask serviceable for its intended duty after repeated use. Maybe it's a stretch to say it results in a free mask, but it's effectively true!

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On the value of double-filtration

by | Tuesday, March 16, 2021 |
If double masking makes an N95 more comfy and encourages use, it helps saves lives!

Watching some rat bastard politician on TV was the first we noticed someone wearing two filters. One with their party's logo worn over a serious N95 led us to think; 'If it's good enough for them...'

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Will ProModeler servos work with NiCds?

by | Wednesday, January 20, 2021 |
How many cells should my packs use?

Figuring out how many cells to use for the control avionics battery pack depends on both the chemistry - and - what it is you're trying to do. Whether it's 2-cells, 4 in series/parallel, or 7 in series, the math is easy and we show you how!

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Are you playin' checkers or chess?

by | Wednesday, December 30, 2020 |
. . . or how not to get screwed on your next servo purchase!

Selecting servos can be confusing and most guys get snookered by expensive advertising campaigns and sponsored pilots who say what they're told to. How can you figure it out for yourself? We show you how!

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How to use an HV-servo with a 6V-radio

by | Thursday, November 5, 2020 |
How-to use an HV-servo with 6V-radio systems

A low-buck approach for how to use a HV servo with a 6V-radio system. Best part? It applies to an X-MAXX, TRX4 or pretty much 'any' vehicle (of any brand) relying on a 6V BEC-circuit to operate the steering servo!

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When's the next super special sale?

by | Monday, October 26, 2020 |
Wanna really get screwed?

Buying into the marketing-driven idea of special pricing, as if costs change based on certain magical days, is a good start! Instead of cat and mouse games, we make you our best offer from the very beginning.

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Servo choice affects your experience

by | Saturday, October 24, 2020 |
Servos affect your fun, choose wisely!

Interested in trying your hand at 3D? Confused by conflicting advice regarding servos? We help guide you through specs like torque, speed, current, and voltage - and why they matter. Plus what's better for you; a BEC or battery - and why!

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About RC servo motors

by | Saturday, September 12, 2020 |

Ever wondered about the difference between DC, coreless, and brushless servo-motors? This askJOHN article addresses it in a largely brand neutral way. and is generically useful because all servos - regardless of brand - use one of these three types of motors (share the link freely).

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How to determine flight time for a 2S1000 LiPo?

by | Wednesday, December 18, 2019 |

Is your avionics battery pack safe for three-flights? How about five? How can you figure out if it's safe to fly a sixth time before recharging the battery pack powering the radio system? The answer determines if you drive home happy at the end of the day, or not!

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Let's gore an RF-ox!

by | Tuesday, December 3, 2019 |

Q. I'm curious what receivers and other electrical components you use, and maybe how you linked them together. In other words, what you find works well with your servos.A. Radio system selection...

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Silk and dope – demystifying modeling's classic finish!

by | Wednesday, August 28, 2019 |
Silk-and-dope the classsic model airplane finish

What's the connection between servo selection, and a brief how-to regarding the classic silk-and-dope model airplane finish? As occasionally happens, we detour through the unexpected coincidences of life before reaching an answer.

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Gasser throttle servo?

by | Monday, July 15, 2019 |

Which throttle servo would you recommend for a gasser? Many criticize using mini-servos in this application, can your mini servos take it? And because it's quite fast, what are your thoughts on using a tail rotor servo?

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Bypassing the BEC

by | Sunday, June 9, 2019 |

Since the BEC included with the ESC is usually limited to 5A of current and modern high performance servos can exceed this, bypassing the BEC and using a 2S LiPo is an easy solution - and inexpensive too.

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Are ProModeler servos programmable?

by | Tuesday, May 21, 2019 |
Programming at the transmitter is easier

A standalone servo programmer is something of a kludge because each servo must be removed from the airframe to access the lead, to disconnect it from the wiring harness and plug into the programmer. Rinse repeat for any adjustment - what a pain!.

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Fear of loss, or how to stack the odds in your favor!

by | Wednesday, April 3, 2019 |
or why otherwise sensible modelers use two batteries!

Marketing types push your buttons by using words like 'safety' to get you to ignore common sense and outfit your model with two battery packs. We explain why this is just BS designed to get rubes off their wallets.

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Servo connectors & extensions

by | Thursday, February 28, 2019 |
Why getting what you pay for can be tricky!

I occasionally field questions regarding servo connectors and extensions (especially for giant scale models). Let's briefly delve into some mechanical and electrical considerations because basically, we (all brands) play by similar rules.

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About pots vs Hall Effect sensors

by | Thursday, November 1, 2018 |
Going to pot is never good!

The best potentiometers are rated at a million cycles while electronic Hall Effect sensors have a theoretical unlimited lifespan. This means pots are wear items. Does this make magnetic sensor technology a no-brainer? Not so quick!

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