====== Argonaut Model 505 ======
{{505.jpg?150|}}

===== Description =====
SSB / CW QRP solid-state transceiver covering 10 - 80 meters.



===== Reviews & Product Brochures =====
  *[[http://www.arrl.org/members-only/tis/info/pdf/7211052.pdf|ARRL Recent Equipment]], QST, 1972, November (Must be an ARRL member and logged in to view.)
{{adgallery:69-79:1971-11_505.jpg?100|}}


===== Related Links =====
  *[[https://web.archive.org/web/20101003061948/http://www.earlandrews.com/ARGONAUT1.html|VE3AB's Argonaut Pages]]


===== Mods =====
  *[[505finals|Final Transistors for 505]]
  *[[http://www.w1hue.us/Articles/TT_NOISE.html|Curing VHF Interference]] in Ten-Tec Argonauts by W1HUE

===== Accessories =====
  *Linear Amplifier Model [[405]]
  *Power Supply Model [[251]]
  *Power Supply Model [[210]]
  *Microphone Model [[215]]
  *Keyer Model [[605]] (KR-5)

===== Specifications =====
==== General ====
  ***Frequency Coverage:** All Amateur bands 10-80 meters
  ***Filtering:** 9 MHz crystal filter, 2.5 kHz bandwidth, 1.7 shape factor @ 6/50 dB points.
  ***Automatic sideband selection, reversible**
  ***Solid state design**
  ***Permeability tuned circuits**
  ***Seven plug-in circuit boards**
  ***Direct frequency readout.**
  ***Vernier tuning.  Dial accuracy +/- 5 kHz (slightly more at 10 meters)**
  ***Stability:** Drift less than 100 Hz
  ***Power required:** 12-15 VDC @ 150 mA receive, 800 mA transmit at rated output.
  ***Contruction:** Aluminum chassis, top and front panel, molded plastic end panels.  Cream front panel, walnut vinyl top and end trim.
  ***Dimensions:** HWD 4.5" x 13" x 7"
  ***Weight:** 6 lbs.
==== Receiver ====
  ***Sensitivity:** Less than 0.5 uV for 10 dB S+N/N
  ***"S" Meter**
  ***AGC**
  ***Offset Tuning**
  ***Tuned MOSFET RF amplifier and mixer**
  ***Audio distortion less than 2%, internal speaker**
  ***Headphone/external speaker jack**


==== Transmitter ====
  ***5 watts input power**
  ***Broad band final amplifier eliminates tuning**
  ***50 - 75 ohms output impedance**
  ***Press-To-Talk**
  ***Instant CW break-in**
  ***SWR bridge**
  ***Integral TVI filter**
  ***CW sidetone**
  ***Integrated circuit balanced modulator**
  ***Automatic CW offset or approximately 700 Hz**
  ***Shaped keying**