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The NAQCC April 2021 Challenge

NAQCC Monthly Challenges are originated and information regarding rules, ideas, or suggestions go to Gary K1YAN. Email him at pix_email_k1yan (1K).

Challenge pages and challenge results are constructed and maintained by Steve WB4OMM; if you see typos, please let him know! Also, the Challenge App (the online Challenge tracking and reporting application) is also maintained by Steve WB4OMM. Email him with any questions at pix_email_wb4omm (1K).


The Collins RT91/ARC-2 Challenge

ARC-2 (41K)

THE COLLINS RT-91/ARC-2 TRANSCEIVER

PREMISE:


The Collins Radio Company name brings to mind a rugged, high end, quality radio with a price tag to match. They were pioneers of some of the first early HF transceivers. Are you thinking KWM-1? Good guess, but roll the clock back to July 1945 when the Collins Company contracted with the US government to provide a high frequency military transceiver to be know as the ARC-2. It was built like a battleship with a price tag of about $2300 ( enlisted military base pay at the time, for those with less than three years service, ranged from $50 to $138 per month ). A contract was signed for the slightly modified model RT-91/ARC-2A in May 1952.

The RT-91/ARC-2 was designed to be installed in all types of Naval aircraft. It was an AM, CW, MCW, 25 tube radio that ran on 26.5 VDC, which was supplied by a dynamotor. It weighed in at a respectable 63.5 pounds for the radio and was about 8” x16”x 22” overall. Add about 20 more pounds of accessories and you were good to go. The radios 17 to 30 watts output, over its 2 to 9 mHz range, was accomplished with four 1625 tubes in the final amplifier … no worries about pushing the finals too hard. Eight pre-set autotune channels could be manually or electrically selected within this range. Autotuning was done with a system of motors, gears and control circuits that allowed channel selection using a remote channel selection switch.

For some nice photos and info on this radio and other vintage equipment, visit the AAFRadio website at https://aafradio.org .


TIME FRAME:
The first day of the month 0000Z through the last day of the month 2400Z.


RULES:
Just make ALL these words from calls of stations you work subject to the General Challenge Rules. (Any spaces in the phrases should be ignored. For example the challenge phrase "INVERTED V ANTENNA" should be treated as if it is the single word "INVERTEDVANTENNA.")

COLLINS RT91 ARC2
NAVAL AIRCRAFT RADIO
AM CW MCW MODES
EIGHT PRESET AUTOTUNE CHANNELS
DYNAMOTOR POWER

The 86 total letters contain these 23 different letters and numbers : A C D E F G H I L M N O P R S T U V W Y 1 2 9

You can use each letter in a call TWICE. For example you could use K3WWP for 2 K's, 4 W's, and 2 P's.

Subsequent QSO's with the same station cannot be used for additional letters. For example, no matter how many times you work K3WWP, you can only use his call for 8 of the letters in the words.

See General Rule #5 for more details on what callsign letters can be used.

If you need some help with your alphabet challenge record keeping take a look at our Alphabet Tutorial page for everything from some great pencil & paper methods to fully computerized tools.


AWARDS:
A certificate and Participation Point go to everyone making all the words and submitting their report before the deadline.

A Participation Point goes to everyone making at least 1, but not all the words and submitting their report before the deadline.


PRIZES:
A choice of an item made by master woodworker Gregg WB8LZG as shown on our prizes page here goes to someone selected via a random drawing from all who participate and submit a report for this month's challenge. A person can only win once, then they become ineligible for future drawings.


LOGS:
For your report, list the words you made and the station used for each letter in the word. The number of stations listed must be the same as the number of letters in each word, even though you use the same station for more than one letter as in:

WORD - K3WWP N2OD WA8REI N2OD
NEXT - NF8M W8REI N8XMS K9EYT

(Note how N2OD is listed for both the O and D.)

You may also include comments about the challenge. Please preface any comments you want posted with "SOAPBOX:" so we will know what you want posted and what is private.

Send your results as text in the horizontal format shown above to:

E-mail: pix_email_wb4omm (1K) (You must type that address into your email program.)
Subject must read: (your call) NAQCC (month) Challenge
For example: K3WWP NAQCC February Challenge

All entries must be RECEIVED before the 10th of the following month at 2400Z.


Results as of April 3, 2021::

 
AH6AX:
COLLINS - W9VC NF1O W4LSV W4LSV WI5H NF1O W4LSV
RT91 - W0RJW KD5TXX W9VC NF1O
ARC2 - K8ZAA W0RJW W9VC W2SKY
NAVAL - NF1O K8ZAA W9VC K8ZAA KA3LOC
AIRCRAFT - K8ZAA WI5H WA5ZR KC5F WA5ZR KC5SAM NF1O KD5TXX
RADIO - K1RWT KC5SAM KB1WOD W2ITT NF1O
AM - KA8HFN KC5SAM
CW - KC5F W9VC
MCW - KC5SAM KC5SAM W9VC
MODES - W9HM KB1WOD KB1WOD NE1F W4LSV
EIGHT - NE1F W2ITT KG5GGI KA8HFN KA5TJS
PRESET - K0SPU K1RWT NE9EE KC5SAM NE9EE KA5TJS
AUTOTUNE - KA8HFN N9KJU W2ITT KB1WOD W2ITT N9KJU NE1F NE9EE
CHANNELS - KC5SAM KA8HFN WA5ZR NE1F NE9EE NE9EE KA3LOC KC5SAM
DYNAMOTOR - KD5TXX W2SKY NE9EE WA5ZR W9HM KN4OK W2ITT KN4OK WA1AR
POWER - K0SPU KA3LOC W4LSV NE9EE WA1AR

All the above get a certificate and participation point.

All below get only a participation point.

 
 

Not eligible for a certificate or participation point for the following reason(s):
@ = Non-member
$ = QRO power

Soapbox: