The original capacitors inside the radio and the FP-250 power supply are now decades old. Over time, the internal electrolyte dries out, causing a loud 50Hz/60Hz AC hum in the audio, voltage drops, or catastrophic short circuits. "Re-capping" the power supply and the radio high-voltage rails is the mandatory first step of any restoration. 2. Sourcing 6JS6C Final Tubes
A range of accessories is available for the FT 250, including:
The radio does not have an internal power supply. It requires a large external brick that provides the high voltages (up to 600V or more for the tubes) and features a built-in front-facing speaker.
Operating an FT-250 requires outboard hardware, as it was not an "all-in-one" desktop box.
The mechanical lubricants used in the 1970s frequently harden into a varnish-like substance. Band switches, pots, and the main VFO tuning dial often require careful cleaning with electronic contact cleaners (like DeoxIT) and fresh, high-quality synthetic grease. 4. Frequency Drift sommerkamp ft 250
High power input of 240W (approx. 300W speech peak input P.E.P.).
To understand the origin of the Sommerkamp FT-250, one must look at the relationship between the Swiss marketing company Sommerkamp and the Japanese manufacturer Yaesu Musen.
: Supports SSB (selectable USB/LSB), CW, and AM.
Designed with easy, seamless connections for linear amplifiers like the FLDX-2000. The User Experience: Strengths and Challenges The original capacitors inside the radio and the
It boast a generous 300W speech peak input (approx. 240W PEP) in SSB, offering solid 100W+ output.
Do you need help finding or service manuals?
Due to the age of these units, anyone looking to buy an FT-250 should be prepared to do some basic electronic servicing:
The FT-250 occupies a special spot in the evolution of transceiver design. It's a , meaning it uses a mix of vacuum tube and solid-state technologies, a common bridge during the industry's transition from all-tube designs. It sits as the "little brother" to Yaesu's top-of-the-line FTdx series, offering robust performance in a more accessible package. Operating an FT-250 requires outboard hardware, as it
To transmit, the operator must switch the unit to "Tune," observe the current meter, and quickly peak the "Grid" control while dipping the "Plate" control. Leaving it keyed in tune mode for more than a few seconds can permanently ruin the final tubes.
The Sommerkamp FT 250 is a versatile air rifle that can be used for various applications, including:
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The was released as a companion to the Yaesu FT-200, often referred to as the "Yaesu FT-200/Sommerkamp FT-250" duo. It was designed for radio amateurs seeking a compact yet powerful station, capable of CW, AM, and SSB operation on all HF bands between 80 and 10 meters. The European branding focused on quality, sturdy design, and convenient power supply options. Key Technical Specifications