Skip to main content

The Best Ever SSB/CW Transceiver of the 1970's

The "Best Ever" SSB/CW Transceiver of the early 1970's was the Yaesu FT-101. It was a shack in the box, and it had the distinction of being the leading radio sold worldwide at that time. It was the ICOM IC7300 of that era.

My FT-101EE

The FT-101 was a Hybrid design featuring only three tubes and the rest solid state. One thing you don't want to do today is smoke the driver tube, a special version of the 12BY7 and the finals which are 6JS6C's. You will need a home loan to purchase a replacement set.

I acquired this radio as a tech special as there was no power output. Five minutes' worth of work and it was fixed. There was an RF choke in the screen circuit to the final amplifier tubes... it was open and thus no screen voltage.

The frequency stability and dial linearity are amazing for 1970. This is one of the best Analog VFO's ever. Friends N2CQR and KK4DAS have used the VFO module from the FT series in their homebrew rig projects. 

Many of the FT-101 series came with a DC-to-DC Convertor strapped to the back panel so the radio could be operated from home, portable or mobile. Optional accessories included a plug-in Noise Blanker and Speech Processor. A Crystal Calibrator was a stock feature, and the band switch had a position for JYY (WWV in Japan).

The FT-101 was highly popular with the CB crowd as this functionality could be invoked with a simple change of a heterodyne crystal (plug-in) and the band switch set to one of the 10M position. Yes, my radio was in the hands of a CB'er at one time. Initially I could not hear a signal generator on one of the 10 Meter bands. Suddenly I heard 10-4 Good Buddy on LSB and I knew. With 100 watts out on 27MHz, you didn't need a "leenear".

These radios today command a pretty hefty price some 55 years after they hit the market.

Yaesu in 1967 test marketed (outside the US) a model called the FTdx100, which was a hybrid radio with 3 tubes and the rest solid-state using Germanium transistors. This was a test radio prototype for the FT-101 series. I have one of those radios as well. 

One of the key features of the FT-101 was plug in circuit boards thus enabling repair by replacement. That was not a feature of the FTdx100 which was/is a nightmare and almost impossible to repair.

Them that know can make stuff go!

BTW the posting on changing the US Licensing Process has out viewed the Topless BB on the beach. I must not be the only one bristling about 45 Minute Extra Class Licenses. Are there rumblings of cancelling QST subscription's and boycotting ARRL contests and Field Days? I know of none such actions but indeed something has awakened the sleeping giant as Admiral Yamamoto knew on December 8, 1941.

73's
Pete, N6QW, The Patron Saint of Solder!

Popular posts from this blog

January 26, 2024. A simple CW Transceiver/Transmitter

Cruise through the lower part of the ham bands bands and what do you hear? Well, FT-8 and CW. Often you will not hear any SSB stations yet go to the lower part of the bands, and it is a cacophony (I love that word) of bad sounding signals and some high-speed keying. Fast is not so much of the issue as is bad, run together and jerky keying. But none the less our hobby started there.    So, you could crank down your ICOM 7300 and watch the waterfall on CW or you could homebrew a radio. Actually, to do CW right you need more thought up front than you do with a SSB transceiver. Often, I will state that a CW Transceiver is much more difficult to build than a simple SSB rig. I published two articles in QRP Quarterly on CW transceivers and all I got was a yawn so maybe history will repeat itself.  Yawn!   30M CW Transceiver with RIT!   Of interest is that the LO is a Varactor tuned LC oscillator using a NE602. Look closely at the RIT circuit which is only activated on ...

August 30, 2024. A PNP 20M SSB Transceiver

Shown below is the Block Diagram for the 20M PNP SSB Transceiver steered in the  Transmit Mode . The components shown in the dotted block are relay steered so that the block module is single pass and amplifies in a single direction. The Block diagram show steered in Transmit.  Essentially the steering process works so that the IF Module input follows the Balanced Modulator on Transmit and then the input side follows the Receive Mixer on Receive. All done with some relays and a bit of RG174U coax. For those who count things in detail, this block diagram is not unlike what was used for the PSSST Transceiver which can be found on my website . Yes, a warmed over P3ST only using PNP devices. TYGNYBNT. 73's Pete N6QW

March 31, 2024. Happy Easter to those who celebrate this day.

What a great day to Binge on Chocolate and experience the pain of that filling that has been leaking.  I would be in that category with the leaking filling(s) had I not just spent an amount equivalent to one of the fancy new uptown appliance box transceivers on two filling repairs. Well at least I can binge on the Chocolate bunnies without fear of pain. Regrettably everything appears to have jumped in price including the price of parts. Well not so much the parts as the shipping costs.  That notably is seen in the eBay treasures. I spotted a nice heathkit DX-20 for about $50 and the shipping was $65. Likely it is a twofer with part being a way to in effect charge a higher price by inflating the shipping and in part by increased shipping costs. Shipping with insurance across the US was about $150 for this jewel and that was three years ago. 6AM on the Left Coast ~ 20M Easter Sunday! My only hope is the cost of Chocolate Bunnies remains steady although a pound of See's Candies f...