• Country
• United States of America (USA)

• Manufacturer / Brand
• Heathkit (Brand), Heath Co.; Benton Harbor (MI)

• Year
• 1980 ??

• Category
• Amateur-Receiver (amateur bands, may include broadcast bands)

• Radiomuseum.org ID
• 158698

• • alternative name: Heath Company

Click on the schematic thumbnail to request the schematic as a free document.

• Number of Transistors
• Semiconductors present.

• Semiconductors

• Main principle
• Superheterodyne (common); ZF/IF 455 kHz; 2 AF stage(s)

• Wave bands
• Broadcast, Long Wave and Short Wave.

• Power type and voltage
• Line plus power jack, mostly with battery or storage battery / 230 AC or 11 - 15 DC Volt

• Loudspeaker
• Permanent Magnet Dynamic (PDyn) Loudspeaker (moving coil) / Ø 10 cm = 3.9 inch

• Power out
• 2 W (unknown quality)

• Material
• Plastics (no bakelite or catalin)

• from Radiomuseum.org
• Model: Allwave Receiver SW-7800 - Heathkit Brand, Heath Co.;

• Shape
• Tablemodel without push buttons, Mantel/Midget/Compact up to 14

• Dimensions (WHD)
• 300 x 130 x 280 mm / 11.8 x 5.1 x 11 inch

• Notes

• The Heathkit SW-7800 all-wave receiver is a rare device with the following data:

  • Frequency range 150 kHz to 30 MHz
  • Double superhet 50,455 MHz / 455 kHz
  • Demodulation
    • AM narrow/wide
    • SSB (USB/LSB)
    • CW
  • Frequency setting
    • Analog over > 1 MHz each and digital with synthesizer in 30 steps of 1 MHz (similar to super VFO principle, remotely similar to Wadley loop)
    • VFO range approx. 5.4 - 6.7 MHz
    • Frequency reading: 5-digit LED display, resolution 1 kHz
  • Input filtering by continuously switched sub-octave filters
  • Antenna inputs, rear: "Lo Z" socket (approx. 50 Ohm, SO-239) and "Hi Z" (long wire), as well as extendable and unscrewable stable rod antenna (1.2 m, which is led directly from the receiver board through an opening in the housing cover; rear right)
  • Built-in loudspeaker, can be switched off via 6.3 mm headphone jack (front), rear MUTE jack and 3.5 mm recorder output (front)​
  • ​Specifications
    • ​Selectivity: AM wide: 5.5 kHz min. at 6 dB​AM narrow, SSB, CW: 2.5 kHz min. at 6 dB
    • Sensitivity:​​ SSB/CW less than 0.35 uV for 10 dB (S+N)/N SensitivityAM less than 2.5 uV for 10 dB (S+N)/N
    • Shape factor: (IF form factor) 1.5 at 6/50 dB
    • Image rejection: (image frequency attenuation): 55 dB min

   

  Der Allwellenempfänger Heathkit SW-7800 ist ein seltenes Gerät mit folgenden Daten:

  • Frequenzbereich 150 kHz bis 30 MHz
  • Doppelsuperhet 50,455 MHz / 455 kHz
  • Demodulation
    • AM schmal/breit
    • SSB (USB/LSB)
    • CW
  • Frequenzeinstellung
    • analog über jeweils > 1 MHz und
    • digital mit Synthesizer in 30 Schritten zu 1 MHz (ähnlich Super-VFO-Prinzip, entfernt ähnlich Wadley-Loop)
    • VFO-Bereich ca. 5,4-6,7 MHz
    • Frequenzablesung: 5-stelliges LED-Display, Auflösung 1 kHz
  • Eingangsfilterung durch mitlaufend geschaltete Suboktavfilter
  • Antenneneingänge, rückseitig: "Lo Z" Buchse (ca. 50 Ohm, SO-239) und "Hi Z" (Langdraht)
  • sowie auszieh- und abschraubbare stabile Stabantenne (1,2 m, die direkt von der Empfangsplatine durch eine Öffnung im Gehäusedeckel geführt ist; hinten rechts)
  • Lautsprecher eingebaut, abschaltbar über Kopfhörerbuchse 6,3 mm (Frontseite), rückseitige MUTE-Buchse und 3,5-mm-Recorderausgang (Frontseite)
  • Netz- (230 V AC) und Batteriebetrieb 11-15 V DC, 0,75 A, (nom. 13,8 V), Buchse an der Rückseite
  • Auszug aus den specifications
    • Selectivity: AM breit: 5,5 kHz min. at 6 dB
    • AM schmal, SSB, CW: 2,5 kHz min. at 6 dB Sensitivity
    • SSB/CW Less than 0,35 uV for 10 dB (S+N)/N Sensitivity
    • AM Less than 2,5 uV for 10 dB (S+N)/N Shape factor (ZF-Formfaktor) 1,5 at 6/50 dB Image rejection (Spiegelfrequenzdämpfung): 55 dB min

• Net weight (2.2 lb = 1 kg)
• 3.2 kg / 7 lb 0.8 oz (7.048 lb)

• Price in first year of sale
• 700.00 DM

• Author
• Model page created by Michael Arnoldt. See "Data change" for further contributors.

• Other Models

• Here you find 717 models, 700 with images and 507 with schematics for wireless sets etc. In French: TSF for Télégraphie sans fil.
  All listed radios etc. from Heathkit (Brand), Heath Co.; Benton Harbor (MI)