Skip to main content

A Boat Anchor Worthy of Collecting.

It is sad when an American ham radio manufacturer no longer produces cutting edge products and then folds. The R L Drake Company is one of those firms.

As a part of my herd thinning, I dug out my Drake TR-7 and powered it up. I was in awe for this is a radio built in the time frame of the late 1970's to early 1980's and had no microprocessors or microcontroller embeds yet performed like it did. In today's dollars and fully kitted think $10K.





Sitting at your operating desk, the TR-7 could operate on all frequencies from 1.5 to 30 MHz on AM, CW and SSB. The PA stage was rated at 250 watts but typically set to deliver 100 watts.

The TR-7 had provisions for 3 filters and a slot for an optional NB. The Digital Display could be switched from the back panel to become a general purpose 100 MHz Frequency Counter. Initially the TR-7 using a jumper board could be used without the digital display and became an Analog Only Radio Readout. There were capabilities to temporarily store frequencies if the digital display board was installed.

This radio was a Christmas present several years ago from my son Tim and his XYL Amy. He got it really cheap as it didn't work and was sold as a Tech Special. I found the problem, and it was a $0.39 three terminal regulator supplying 24VDC to one Op-Amp. That small cost part made it totally inoperative.

But the TR-7 is not for the faint of heart to repair. It is one complex radio and takes a lot of analysis to find the problem. You also need a set of extender boards (unobtanium) to service the radio as the key to its compact size are the multitude of plug in boards. 

With a G4GXO frequency stabilizer board installed in an earlier TR-7 I had, the frequency held within 11 Hertz over a 12-hour period.

You can find TR-7's on eBay in the range of $600 to $2000 so it is an investment. Also look for a later S/N >4000. I think my son paid about $250 for the Tech Special so mine cost $250.39. Likely the lower cost ones have issues so you really have to plunk down $1000 for a really old radio that works. But think hard when for the same sum you can get a IC7300 NIB with a guarantee. 

Still time to make a donation to a food bank and spend some time praying for those Americans who will lose their ACA extension. When you go to vote in the 2026 Mid-terms keep in mind who is responsible for your increased healthcare costs. Still believe the economy is A++++++++++?


73's
Pete N6QW


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...