The HRO Senior series (sometimes known as the HRO-series) embodies an S-Meter, crystal filter circuit with phasing and selectivity controls, and coils sets A, B, C and D which have a bandspread feature. It was availablewith either 2.5 or 6.3 volt tubes.
The frequency range is determined by use of removeable, slide-in coil packs:
Type J = 50 - 100KHz
Type H = 100 - 200KHz
Type G = 180 - 430KHz
Type F = 480 - 960KHz
Type E = 900 - 2050KHz
Type JD = 1.7 - 4.0MHz
Type JC = 3.5 - 7.3MHz
Type JB = 7.0 - 14.4MHz
Type JA = 14.0 - 30.0MHz
Original cost: USD 230.-
General characteristics
- HAM bands
- ?
- Frequency stability
- ?
- Tuning steps
- ?
- Memories
- ?
Receiver
- RX-range
- 0.05-30 MHz depending on coil pack
- Modulations
- AM CW
- Sensitivity
- ?
- Selectivity
- ?
- Filters
- ?
- Receiver system
- Single conversion
- IF-frequencies
- ?
- Image rejection
- ?
- Audio output
- Requires external output transformer of 7,000 ohms impedance and external speaker.
Connections
- Antenna
- -
- Impedance
- 50 Ω
- Other
- -
Electrical
- Power requirements
- ?
- Current drain RX
- ?
- TX
- -
Physical
- Dimensions (w×h×d)
- ?
- Weight
- ?
- Form factor
- Base Station
- Manufactured
- Between 1934 and 1943 in USA
Other features
- Usage
- Amateur / Ham radio operators
- Features + options
- -
- Accessories
- -
- RigReference ID
- 3622
- MPN
- NATIONAL-COMPANY-HRO-SR
Manuals, diagrams and brochures
-
No documents available for this particular model.
- Upload relevant documents
New and second-hand prices
Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used National Company HRO-SR. Just bought or sold this model? Let us know what you traded it for and help other ham operators!
Based on similar Receiver equipment, the estimated value of the National Company HRO-SR is around:
- USD 159 ~ USD 295
This estimate is based on similar equipment and may not reflect the exact value of this model.
These estimates are based on the following prices:
Links & tools
- Search YouTube for National Company HRO-SR videos
- Search Google for National Company HRO-SR information
- Search Google Images for National Company HRO-SR
- Search Wikipedia for National Company HRO-SR information
- Search the Boat Anchor Manual Archive (BAMA) for National Company HRO-SR for manuals and documents (using Google)
-
Find the National Company HRO-SR on Amazon
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