The Biplane Forum > Biplane Technical Forums > Electrical & Instrumentation > 8.33 Spacing (required?)



Help Support Biplane Forum by donating using the link above or becoming a Supporting Member.
Reply
 
Thread Tools Display Modes
Old 04-28-2017, 05:09 PM   #1
Nate
Preparation A thru G failed, now it's time for preparation H
 
Join Date: Mar 2016
Location: Kansas
Posts: 467
Liked 38 Times on 31 Posts
Likes Given: 7

Default 8.33 Spacing (required?)

I was just going to buy a used radio and the owner was selling b/c it doesn't have 8.33 spacing. It seems like a requirement in EU. Is it ok to buy a radio for usa if it doesn't have 8.33 spacing?


Nate is offline  
 
Reply With Quote
Old 04-28-2017, 05:16 PM   #2
IanJ
BiP_LIFETIMESUPPORTER.png
 
IanJ's Avatar
 
Join Date: Jun 2007
Location: Seattle, WA, USA
Posts: 1,411
Liked 227 Times on 173 Posts
Likes Given: 77

Send a message via MSN to IanJ
Default

The USA does not now, and appears to have no plans to, require 8.33 spacing. If you plan to fly the plane into the EU, you'll need 8.33 spacing after some cutoff date in the future.

Also: good way to score some good radios!


__________________
Marquart Charger MA-5 build: makin' ribs
1956 Champion 7EC, "Norbert"
IanJ is offline  
 
Reply With Quote
Old 04-28-2017, 05:17 PM   #3
lanceav8r
BiP_SUPPORTER.png
 
Join Date: Mar 2012
Location: San Diego
Posts: 460
Liked 54 Times on 43 Posts
Likes Given: 24

Send a message via MSN to lanceav8r
Default

8.33 spacing is for Europe. 25khz spacing is for the rest of the world. You are good. I found it interesting that 8.33khz spacing also requires 24volt.
lanceav8r is offline  
 
Reply With Quote
Old 04-28-2017, 07:05 PM   #4
yhuubert
European Pilot
BiP_SUPPORTER.png
 
yhuubert's Avatar
 
Join Date: Nov 2015
Location: Tallinn, Estonia
Posts: 62
Liked 10 Times on 7 Posts
Likes Given: 162

Default

Quote:
Originally Posted by lanceav8r View Post
I found it interesting that 8.33khz spacing also requires 24volt.
Where did you get that? May be you mean 8-10W vs 16W power?

Garmin GTR225 is 9-33V (don't remember if both the 10W A as well as 16W B models are the same), ICOM A220 is 12/24V, Trig TY96 is 12V (but TY97 is 22-33V). Thinking of getting one one of those for the 8.33 requirement this year.
__________________
1975 Pitts S2A N80050
yhuubert is offline  
 
Reply With Quote
Old 04-28-2017, 08:46 PM   #5
cashflyer
Registered Users
 
Join Date: Aug 2011
Location: Greenville, SC
Posts: 1,096
Liked 319 Times on 195 Posts
Likes Given: 40

Default

I see plenty of 8.33 radios on the market that are 12 or 28 volt, however I also ran across this 'press release':

April 3, 2017

FRIEDRICHSHAFEN, Germany — True Blue Power will introduce its newest power converter to attendees at Aero Friedrichshafen this week. The TC230 DC-to-DC step-up converter utilizes the aircraft’s 10 – 18-volt input to power 28-volt instruments and avionics, including radios, GPS, and electronic equipment.

The introduction of the 230-watt converter to European aircraft owners and operators is timely. Effective January 1, 2018, all aircraft flying in European airspace must be equipped with 8.33 kHz channel spacing radios, which require 28-volt power.

“The TC230 is ideal for aircraft owners with 14-volt electrical systems who require the use of 28-volt power for 8.33 kHz radios and other 28-volt instruments and avionics,” said Tom Genovese, True Blue Power Account Manager. “Many of our European customers are using the TC230 to meet the fast-approaching 8.33 radio mandate.”
__________________
They don't think it be like it is, but it do.
cashflyer is offline  
 
Reply With Quote
Old 04-28-2017, 08:53 PM   #6
IanJ
BiP_LIFETIMESUPPORTER.png
 
IanJ's Avatar
 
Join Date: Jun 2007
Location: Seattle, WA, USA
Posts: 1,411
Liked 227 Times on 173 Posts
Likes Given: 77

Send a message via MSN to IanJ
Default

Radio manufacturers may choose to make 8.33 radios which need 28 volts, but there's nothing inherent to channel spacing which demands a particular voltage. I know the GTR225A (the variant with 8.33 spacing) will operate from 9-33 V, according to Garmin. Sounds like someone wrote a press release to scare people into buying something they may not need.
__________________
Marquart Charger MA-5 build: makin' ribs
1956 Champion 7EC, "Norbert"
IanJ is offline  
 
Reply With Quote
Old 04-29-2017, 07:30 AM   #7
yhuubert
European Pilot
BiP_SUPPORTER.png
 
yhuubert's Avatar
 
Join Date: Nov 2015
Location: Tallinn, Estonia
Posts: 62
Liked 10 Times on 7 Posts
Likes Given: 162

Default

Quote:
Originally Posted by cashflyer View Post
8.33 kHz channel spacing radios, which require 28-volt power.
Proves again, that not everything that's on the Internet is true
__________________
1975 Pitts S2A N80050
yhuubert is offline  
 
Reply With Quote
Old 04-29-2017, 10:43 PM   #8
cactusav8r
Cactusav8r
BiP_LIFETIMESUPPORTER.png
 
cactusav8r's Avatar
 
Join Date: Dec 2014
Location: Athens, AL
Posts: 723
Liked 139 Times on 98 Posts
Likes Given: 47

Default

I don't believe you need the 8.33 spacing in Europe unless you plan on flying at flight levels above FL195.
cactusav8r is offline  
 
Reply With Quote
Old 04-30-2017, 05:54 AM   #9
yhuubert
European Pilot
BiP_SUPPORTER.png
 
yhuubert's Avatar
 
Join Date: Nov 2015
Location: Tallinn, Estonia
Posts: 62
Liked 10 Times on 7 Posts
Likes Given: 162

Default

Quote:
Originally Posted by cactusav8r View Post
I don't believe you need the 8.33 spacing in Europe unless you plan on flying at flight levels above FL195.
Oh yes you do, everyone does. Below FL195 was the old year 2008 thing. Since 2013 all new radios and upgrades have to have been 8.33. And since the end of this year, 1 January 2018: all aircraft, that are equipped with radios, to be capable of 8.33 kHz channel spacing capability.
__________________
1975 Pitts S2A N80050
yhuubert is offline  
 
Reply With Quote
Old 04-30-2017, 09:34 AM   #10
cactusav8r
Cactusav8r
BiP_LIFETIMESUPPORTER.png
 
cactusav8r's Avatar
 
Join Date: Dec 2014
Location: Athens, AL
Posts: 723
Liked 139 Times on 98 Posts
Likes Given: 47

Default

Gotcha. We have some planes with them in it, Lots of KNOB turning.
cactusav8r is offline  
yhuubert Likes This 
Reply With Quote
Old 05-01-2017, 03:47 PM   #11
lanceav8r
BiP_SUPPORTER.png
 
Join Date: Mar 2012
Location: San Diego
Posts: 460
Liked 54 Times on 43 Posts
Likes Given: 24

Send a message via MSN to lanceav8r
Default

That press release is what I read regarding the 24v and 8.33khz.
lanceav8r is offline  
 
Reply With Quote
Old 05-01-2017, 03:49 PM   #12
lanceav8r
BiP_SUPPORTER.png
 
Join Date: Mar 2012
Location: San Diego
Posts: 460
Liked 54 Times on 43 Posts
Likes Given: 24

Send a message via MSN to lanceav8r
Default

8.33khz is a major pain in the rear. For some reason adding the extra digit makes it hard for me to remember then tune the frequency. It is usually given along with a heading and altitude change.

Quote:
Originally Posted by cactusav8r View Post
Gotcha. We have some planes with them in it, Lots of KNOB turning.


lanceav8r is offline  
 
Reply With Quote
Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
406 ELT legally required date akmetal Hangar Talk 15 04-04-2017 12:45 AM
Air Filter required Skybolt-Tony Fabric & Paint 2 12-14-2015 08:03 AM
primer required? navybipe Fabric & Paint 48 07-10-2015 12:54 AM
Inverted oil system service required? curtis Lycoming & Continental 6 01-20-2015 08:32 PM
What is required for toe in/out on S1S Grove gear? saber25 Pitts 31 05-14-2014 11:14 PM