05 June 2025

The Ten-Tec, Made in USA - A brief history of modern Ten-Tec and how the Phoenix came about...

The Ten-Tec, Made in USA - A brief history of modern Ten-Tec and how the Phoenix came about.

Many of you know Ten Tec was acquired by RF Concepts who liquidated most of Ten Tec’s production assets such as the circuit board assembly equipment as well as the tool and die, machine, plastic injection molding and sheet metal shops. They shifted everything to a complete outsourcing model and ran fire sale and liquidation pricing, squeezing Ten Tec like a big, fat orange until there wasn’t even any pulp left, then declared bankruptcy leaving the remaining assets to RKR which was formed as what appeared to be a debt liquidation company. There were some IP issues which opened a dialog between N8WFF and the owners who indicated they just wanted a way to recover some of their money and had no interest in ham radio business. They were about to auction everything off at Ten Tec because it was too far away to deal with. I loved Ten Tec and believed in Ten Tec so against better judgement I offered to purchase the entire thing as it was. Jan 1, 2016, Ten Tec officially became a subsidiary of Dishtronix, Inc. Every radio that could be built from parts had been built and there was no money to buy new parts because creditors would not have anything to do with Ten Tec. Fortunately, I had cash to put in to bail out their unfulfilled commercial contracts which enabled me to get Ten Tec back to an operational status. I also started repairing the backlog of radios that had been sitting a couple of years there and got all of them back to their owners. I kept repairing radios usually for a couple of hundred dollars, a loss
when you consider a Tech might work two or three days on some of them, and started supplying parts again, also at a loss, just to support the good will of the Ten Tec customer base. It was OK because I was making money in other areas which I could subsidize the ham radio customers. I managed to get RX340 and RX331 production restarted and had just begun with the introduction of the Omni VII+. I had successfully cleaned up the mess that was Ten Tec and had them on stable financial footing. Then COVID hit and the rug was pulled completely out from under us. One of the chip factories burned down and without those chips we were unable to build new radios as we had intended. I was faced with a real dilemma. Completely redesign existing radios with the obstacle of not having the original team, having to used antiquated and poor performing layout software and to rewrite man years of code using obsolete and unsupported development environments which were no longer available – OR – do a new radio.

I procrastinated for a time expecting the parts shortages would solve itself. It did not, however. Ham radio is a very small and insignificant, even nonexistent market as far as chip makers are concerned. For many years we benefited from and built on the chips developed for analog cell phones and analog television. When those industries went digital, the demand for analog mixers and IF chips dried up. Further when televisions and monitors went to LCD the high voltage market of capacitors, etc. dried up. The manufacturers saw COVID as an excuse to purge all unprofitable components from their catalog and that is exactly what they did. Not only were the parts we needed not coming back, they are NEVER coming back. Redesign is the only choice left.
I decided rather than to try to reinvent the past to go with something new. During all this transitioning, someone from Europe approached me about a partnership for a new short
wave radio he was developing. I was very impressed but found that he was actually the marketing guy and not the technical guy who actually developed the radio. Those two eventually parted ways and the connection went silent. A year or two later, I don’t exactly remember when, Konstantine, the technical guy, contacted me about a potential partnership on a new kit he had developed. It was very impressive and really a work of art considering one man had done most of it. We had long discussions about what it would take to become a Ten Tec and many technical exchanges under non-disclosure, etc. Unfortunately, we couldn’t reach an agreement that would work for everyone, and we agreed to just disagree on some things and lost touch. I could clearly see that war was coming and that it would be brutal and tried to warn Konstantine to get out, but he dismissed it saying this sort of thing happens all the time. War came and the connection went silent for a long time. Then one day, I received information from my friend telling me he was hiding in the forest outside Kiev, and that the war was far worse than the news media was telling us. Graveyards were overflowing with no one to bury the dead and any man under 65 was being abducted right off the street and pressed into trench warfare at the tip of a gun in his back. He didn’t want all his work to just disappear and said I was the one person he knew who understood and appreciated all that he had done, and was deserving because I was ethical and had not stolen from him, and did I want it for free to carry on, yes or no? I of course accepted but said “Why didn’t you let me know sooner? Maybe I can help...”, He had also sent me a picture of his family and absolutely adorable 5 year old daughter. I made my mind up right then and there that this adorable little child wasn’t going to grow up without a daddy in a hell hole, because you know what happens to children in that situation.

Front panel layout prototype 

I mobilized every resource I had. Making phone calls to people in places that might help. We planned extraction missions by sea and by air, but how do you extract a 5 year old underwater? In the end he filed some special paperwork, and it took a long time to get approved. Maybe some of my calls helped with that. I started a prayer chain too and there were MANY hams praying for that family to be delivered. Eventually he got approval to leave. On the day he got to the border the papers didn’t help. The crossing guards held him up for almost 8 hours and were not going to let him out. Then a miracle happened. The guards started acting like they were drunk and confused and couldn’t understand what was going on. One of those frustrated, dazed and confused guards waved to him and he was across the border family and all! I later told him what had happened, that the power of so many prayers moved the Holy Spirit to confuse those guards and let his family cross. Anyone reading, scoff if you will but never doubt the power of the Holy Trinity. Today that little girl and her family are doing just fine. My motivations are not to become rich or build an empire, but to be able to help those who really need it, because I know first hand what it is like to want help and to need help and for no one to be there. We can’t take material wealth to the grave. Wealth however IS a tool we can use to help other people with. What we do take is what we learn from one another by helping each other. I could make a lot more money using my skills to make things to kill each other with, but I prefer to make things that can help each other and that make each other happy. That is the spirit behind the Phoenix – to make a positive difference and we hope you will use it that way. As an engineer I hope to leave the world a better place than I found it.

Front panel engineering prototype

With my friend safe we decided to do a new radio using what he has accomplished as a starting point and Phoenix was born. We decided to develop an entirely new what Ten Tec calls the SPU (Signal Processing Unit) which is a plug in DSP module utilizing a quad core ARM processor operating at 1.3 GHZ with integral DSP cores and GPUs, 1GB RAM, 32GB EMMC memory, Bluetooth, Wi-Fi and 1GB Ethernet PHY, HD HDMI, etc. A new front panel layout was done as well as a new display carrier with a native 1920 x 1280 High Definition AMMOLED (similar to OLED) display. The ADC and FPGA were modified to be a dual channel system. N8WFF has designed a new version of the Orion II preselectors and a new transmit power amplifier chain based on the Eagle. Low pass filters and antenna tuner from the Eagle are adopted as well as the VFO knob, while Argonaut 6 knobs help on the concentric controls with construction and distribution techniques from the Omni 7+. We took the best that Ten Tec ever did in anything that I could use and joined it with what is probably the most technologically intense signal processing unit ever built for a civilian radio, and we present it to you as the Phoenix. Named in authentic Ten Tec fashion for the Greek mythological Fire Bird which rose from the ashes to rebirth, just as Ten Tec is relaunching after all the unfortunate events of the last near decade. We, the designers and builders of the Phoenix feel we have delivered something as powerful, or more powerful than any of our competitors in a form factor smaller and lighter than theirs and at a significantly lower price. It is fast, it is beautiful, and it sounds good. It is also fully remotable right out of the box with nothing to add.

Rear panel engineering prototype

When you buy a Ten Tec you are not just buying a radio, you are helping fund our mission to help those in need, to assist those less fortunate, to offer a hand up, not a handout to anyone needing it. We manufacture everything, circuit board assembly etc. in our own facility that we own and improve with lots of power necessary for manufacturing and proper antistatic flooring and other facilities necessary to really do the job right. Before Ten Tec was liquidated, we made metal cabinets for most of the products in ham radio, and we endeavor to bring that back offering manufacture of circuit boards up to finished products and distribution for hams with a dream of a product but no way to get it too market. We support America First, pro First Amendment, backed and guaranteed by the Second Amendment. I am the guy who developed and brought you high power legal limit plus reliable solid-state amplifiers over two decades ago with my Prometheus DX2400L1 amplifier and the Hermes board which became the basis for the Apache Labs SDR which was my concept, but I was not allowed to work on it because I was a commercial guy. With your backing and my new facility in Dayton I will be able to bring more new technology to ham radio. I work with the best engineers in the world because they reach out and find me and find a home for kindred spirits, a place where exceptional talent is appreciated and encouraged instead of suppressed. If we can’t give you something better, why would we bother? We have stiff competition from the Japanese and Chinese with their near infinite funding. It is up to you, the customer to decide who shall lead the communications technology race. Without your funding we can’t compete and will go away. It is that simple. When you buy a Ten Tec, you bring our next generation radios that much closer to reality while getting a solid performer you can use daily in your station. Ten Tec has a long history of innovation and bringing you technical firsts and with your support we will continue to do so. I’ve come this far with no financial backing or support. Imagine what I might do with 100 of you behind me, or 1000 of you, or 10,000 of you. What kind of difference could Ten Tec make then?


Ten-Tec web: MODEL 594 PHOENIX - coming soon

Ten-Tec at Hamvention 2025: Phoenix 594 at Hamvention 2025

01 June 2025

The Ten-Tec, Made in USA - Brief history (1968 - 2005) by Scott, W4PA

The TEN-TEC, Made in USA - Brief History (1968 - 2005) by Scott, W4PA

Ten-Tec was founded in 1968 by Al Kahn, K4FW (SK), and Jack Burchfield, K4JU. Mr. Kahn became a Silent Key in 2005. Mr. Burchfield is currently President. 

In addition to manufacturing amateur radio and commercial communications equipment, Ten-Tec operates a complete tool and die shop and molding facility. Ten-Tec builds all its own enclosures as well as custom work for outside customers. 


Ten-Tec is located in Sevierville, TN, and is a 100% U.S. owned privately held company. Majority stockholder is Mr. Burchfield with several past and present employees and their families being minority stockholders.


From the Ten-Tec Reflector June 20, 2005

There is an independent board comprised of a few of the owners and several other successful business personalities who are licensed amateurs but do not have an ownership interest in the company itself. They provide objective perspective and advice to us.


The day-to-day operations are headed by Jack Burchfield and Ten-Tec VP Gary Barbour, AC4DL. We have a management team of 9 people (myself included) under Jack and Gary that oversee various parts of our operation to take care of the various day-to-day dealings with customers, service, production – everything.


2005 is 37 years for us in ham radio - many more to come.

73,
Scott Robbins, W4PA
Amateur Radio Product Manager

07 May 2025

Ten-Tec White paper 3_2025 - Ten-Tec Serial Number Decoding by N9VV (1989 - 2010) with updates...

Ten-Tec White paper 3_2025 - Ten-Tec Serial Number Decoding by N9VV (1989 - 2010) w/updates

Example: Serial Number 06A10108

06 at the front is month of manufacture, or scheduled production run month. If we were scheduled to build a run of a particular model in June, and for some reason we were delayed to July or August for that particular run, we'd still put "06" at the front of the serial number. "A" is a separator between the groups of digits. "1" is the production run # for that particular month. "010" is the unit number. "8" is the year of manufacture. 
A "C" separator began being used in 2000.


1. Omni VI Plus s/n 06A10108
06 = June
A = separator
1 = production run # for that particular month
010 = unit #
8 = year of manufacture

Unit #10 of production run #1 from June, 1998.


2. Model 238 Tuner s/n 41A10349
41 = April
A = separator
1 = production run # for that particular month
034 = unit #
9 = year of manufacture

Unit #34 of production run #1 from April, 1989.


3. Model 420 Amplifier s/n 5B10053
5 = May
B = separator
1 = production run # for that particular month
005 = unit #
3 = year of manufacture

Unit #5 of production run #1 from May, 1993


4. Model 9420 Power Supply s/n 12A10082
12 = December
A = separator
1 = production run # for that particular month
008 = unit #
2 = year of manufacture

Unit #8 of production run #1 from December, 1992


5. Model 961 Power Supply s/n 41A10019
41 = April
A = separator
1 = production run # for that particular month
01 = unit #
9 = year of manufacture

Unit #1 of production run #1 from April, 1989


Update: April 13, 2004 (Courtesy Scott Robbbins N4PA, of Ten-Tec)

I looked at the page you referenced. The description listed as "old e-mail" is approximately/mostly correct. We switched from consecutive serial numbers to date encoded ones in 1988. Some rigs used both if they were in production then, like the Paragon, Corsair II and Titan 425 amplifier. Consecutive numbers were earlier, then encoded ones after.

The early encoded serial numbers read something like 72A10829, the 72 being the week or month of the year of manufacture either correct or reversed. 72 could be 27th week. It could also be February with the "7" being equivalent to "0". 40 would be either 40th week or 4th month - it depended on what model and what year it was built in the late 80's or early 90's. We stopped the week or reversed week or month or reversed month mixed designations around 1992 and went to only the month. So serial numbers would read then 01A10823 or 1A10823, which would mean January.

So 01C10823, for a Jupiter is January 2003, production run 1 for the month (the 1 after the C), 082 is the unit number. C is a separator. Almost everything in the late 80's to 2000 used "A" for the separator but there were occasional exceptions (some rigs used "B" - and when the Hercules II went to 2000 we used "H" for them). We started using "C" as the separator in 2000 and we did that to separate decade.

Here's the rub, though, just because the serial number reads 01C10823 doesn't mean it was January 2003 when built. It was either January 2003 or near-term later, but never earlier. The serial number actually refers to when the radio was *scheduled* to be built, but it may not have actually happened then for any number of reasons. But to keep track of it internally, the best way is to use serial numbers for the scheduled run to keep everything flowing smoothly regardless of the date it actually gets built. An example of this were first production run Orion radios. All the serial numbers for the first run are 09Cxxxx2. We scheduled them to be built in Sept 2002, but delays took us out to March 2003 before they were actually built and shipped. Most common is to build them when they are scheduled to be built, or perhaps within one or two months after they were scheduled.

73
Scott Robbins
W4PA


(N1EU note: Up until April 1989, serial number labels showed the three-digit model number followed by a consecutive number. One known exception to this was the use of 580-XXXX labels on many of the Corsair II's. The information below relates to the serial numbering after April 1989, beginning with the later Corsair II's. However, the serial number scheme changed again sometime after 2010. So, the scheme described here is only valid from approximately 1989-2010)...


Courtesy copy from:
Ten-Tec Wiki
N5NA web
Jupiter Resource Page

06 May 2025

Ten-Tec White paper 2_2025 - Power supply Model 962 main switch replacement

Ten-Tec White paper 2_2025 - Power supply Model 962 main switch replacement

The Model 962 is the power supply for the Omni VI+. (Model 564) It may also be used with several other TEN-TEC transceivers (e.g. OMNI V, OMNI VI)

The on/off main switch on the matching AC power supply unit Model 962 for all related TT Omni series radios is the DPDT rocker switch. 

Carling 62012471-x-x series is what can be use used as replacement.


The rocker DPDT On-none-on switch from Carling fits for example.


If you will use 3 position 62012471-E-0 switch instead of originally used 2 positions, then you have to left one position unused.

Mouser source:

05 May 2025

Ten-Tec White paper 1_2025 - Removing the knobs on the Omni VII

Ten-Tec White paper 1_2025 - Removing the knobs on the Omni VII

This guide could be used on all other rigs with the same knobs used.


Large VFO Knob

  1. Slide the rubber ring off the knob.
  2. Use a 1/16" Allen wrench to loosen the set screw.


Small Knobs

  1. Slide the sliver ring off the knob. (The ring may be tight requiring a small screw drive to pry it off slightly.)



  2. Use a 0.050" Allen wrench to loosen the set screw. 



01 May 2025

Collins mechanical filters and installation guide for Yaesu FT-8xx radios - updated 17-Jul-25

Collins mechanical filters and installation guide for Yaesu FT-8xx radios

Even although this line of radios is obsolete (except FT-818ND) there is still many people who are looking for installation guide of the optional filters... 


1. Type of filter

526-8733-010: 455.00kHz center frequency / 0.3kHz BW @ -3dB / 1.00kHz BW @ -60dB / -10dB insertion loss / 7-poles (simply 300Hz / 7-poles filter)




526-8733-010 (alias Inrad #712): 455.00kHz center frequency / 0.34kHz BW @ -6dB / 0.85kHz BW @ -60dB / -9dB insertion loss / 7-poles (simply 300Hz / 7-poles filter)




526-8733-020 (alias XF-115CN or YF-122CN): 455.00kHz center frequency / 0.3kHz BW @ -6dB / 1.00kHz BW @ -60dB / -10dB insertion loss / 7-poles (simply 300Hz / 7-poles filter)




526-8686-010: 455.00kHz center frequency / 0.45kHz BW @ -3dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)



526-8686-030 (alias XF-115C): 455.00kHz center frequency / 0.45kHz BW @ -6dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)



526-8686-030 (alias YF-122C): 455.00kHz center frequency / 0.5kHz BW @ -6dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)



526-8693-010 (alias AOR MF500 or YF-122C): 455.00kHz center frequency / 0.49kHz BW @ -3dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)





Collins (alias Inrad #705): 455.00kHz center frequency / 0.595kHz BW @ -6dB / 1.56kHz BW @ -60dB / -7dB insertion loss / 7-poles (marked as 500Hz / 7-poles filter)




526-8686-030 (alias YF-115C): 455.00kHz center frequency / 0.45kHz BW @ -6dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)




526-8693-010 (alias YF-115C or Inrad #705-C): 455.00kHz center frequency / 0.5kHz BW @ -3dB / 2.00kHz BW @ -60dB / -5dB insertion loss / 7-poles (simply 500Hz / 7-poles filter)



2. ESD protection

Install and use some ESD protection tools on bench like ESD mat grounded properly through 1.5MOhms resistor and wristband connected to the ESD mat at the corner.


3. Installation the filter (hardware)

For correct installation you can follow the manual for FT-817ND see page 74 (or respective FT-8xx version of radios).



Front panel view > slide into the socket while 3-pins are on the left and four pins are on the right side > filter case upwards. Push carefully on both sides at the same time to click into the headers.

Also you can check details here:
SP6AB radio blog: Home made CW YF-122C filter board for Yaesu FT-817/857/897


4. Filter board setup

Which filter is installed on the filter's PCB is defined by installed resistors combination.

If it is factory soldered, then do not care about it. 

If you installed yourself then check the proper resistors setup also on the link here:
SP6AB radio blog: Home made CW YF-122C filter board for Yaesu FT-817/857/897


5. Installation the filter (software) – Menu 38

After assembling the radio back and turning it on go to Menu 38 (long press F-button and turn the SEL knob on the left to position 38) and change the OP FILTER menu from OFF to CW in the middle row (by main dial knob). Then exit by long press F-button.


6. Activation the filter – NAR function

If all is ok and no ghostbusters in your radio, then now when you will short-press the F-button and using SEL knob you will find the IPO / ATT / NAR menu in third lowest row on the display > after pressing C-button (right under display) assigned to NAR function you should be able to select narrow filter for CW which is installed in radio. Also, it would be hearable by narrower and lower noise in speaker.

Note: For some reason some users are reporting that when trying to select CW position in Menu 38 there is only OFF and SSB... but after careful turning back and forth it should appear CW...


Hope it helps. 

73 - Petr, OK1RP
"Apple, Ten-Tec & Elecraft freak"
B:
http://ok1rp.blogspot.com
MeWe:
https://bit.ly/2HGPoDx
MeWe:
https://bit.ly/2FmwvDt


Installation document by P. Ourednik, 17-Jul-2025. Document 07-25, rev.5.0

18 November 2024

All Digital Transceiver ADT-200A by HB9CBU part II. - First short performance tests

Subject: Receiver performance comparison

This experiment compares the basic receiver performance of the ADT-200A with known reference unit on the same antenna. Settings on both units: Band: 20m Mode: CW BW: 200Hz NB: OFF Notch: OFF AGC: fast AGC threshold (ADT): -80dBm

https://youtu.be/M7_gULhDwaU?si=dKPX4cNS3BLiPCdO Results: ADT receiver sounds much more selective as same as the BDR sounds better for close-in signals on the band. Signal S9 +40dB in the pileup just 1kHz away sounds strange on KX3 compared to ADT where it is also hearable but much weaker...



Subject: Receiver performance initial test This experiment shows receiver performance of the ADT-200A with different AGC and filters settings. Settings: Band: 20m Mode: CW BW: 50 - 500Hz NB1, NB2: OFF Notch: OFF AGC: fast AGC threshold (ADT): -80dBm Attack: 2ms Hold: 100ms Decay: 500ms

https://youtu.be/1SUs4nJdr6k?si=Tjujl6shEIGKenY3 Results: Amazing selectivity and high BDR for close-in signals, beautiful sound with smooth low-noise at -80dBm AGC threshold. Narrow filters are so effective that station need to be tuned quite precisely.

More info here:

ADAT page         - ADAT by HB9CBU


73 - Petr, OK1RP