Friday, February 6, 2026

17M ~ The Sneaky Band


The IF is 4.9152 MHz and the LO is 23 MHz

17M, the Sneaky Band.

Some 19 years ago, I built my 1st 17M transceiver and very much enjoyed working DX on that band. Several years ago, I revisited that rig and removed the crystal switched VXO and in went the Si5351 and Arduino. One of the reasons for the change was to give full band coverage. [Click on the link for ad nauseum details of the 17M Build.]


Center Area Relay Switched VXO 


Board Overview ~ 7X7X2 Inch Chassis



Non-Analog 2 Band VFO

The 17M band has a lot of charm as it is a DX Band. It is void of contests as it is considered a contest free sanctuary but has a very active FT-8 following. I call it a sneaky band because the CQ POTA, SOTA and IOTA aficionados frequently use the band as these are not considered contests!

In essence you avoid the 45 Minute Extra Class wonders trying to work contests; but will hear them shout CQ POTA. Given that the 17M antennas are modest in size it is a great band for portable operation while hiking or camping. 

One notable item is the homebrew diode ring used as the Balanced Modulator/Product Detector which has a panel mounted switch to unbalance the ring and used for Tune purposes. The RF Output device is a MRF260.

Attention Adults in the Room

The economy is in the toilet, and I hope the majority is happy with their choice. The massive Layoffs in January is a sure sign there is a huge problem. The hirings are pitiful and we now have more evidence of what needs to be done in the midterms. You might want to stop wearing your red ball caps.

Vietnam

To recognize our contingent of blog readers in Vietnam here is a partial translation. Side comment: Vietnam has a plethora of stunning YL's. I've seen them!

Băng 17M có rất nhiều nét cuốn hút vì đây là một băng chuyên săn DX. Nó không có các cuộc thi vì được xem như một “khu bảo tồn không thi đấu”, nhưng lại có cộng đồng FT-8 hoạt động rất sôi nổi. Tôi gọi nó là một băng “lén lút” vì những người chơi CQ POTA, SOTA và IOTA thường xuyên sử dụng băng này — do các hoạt động đó không được xem là thi đấu!

Về cơ bản, bạn tránh được những “pháp sư Extra Class 45 phút” đang cố gắng tham gia contest; nhưng bạn vẫn sẽ nghe họ gọi CQ POTA. Vì ăng-ten 17M có kích thước khá nhỏ gọn, đây là một băng tuyệt vời cho hoạt động portable khi đi bộ đường dài hoặc cắm trại.

Một điểm đáng chú ý là mạch vòng diode homebrew được dùng làm Balanced Modulator/Product Detector, có một công tắc gắn trên panel để làm mất cân bằng vòng nhằm phục vụ mục đích Tune. Linh kiện khuếch đại công suất RF là MRF260.


German Translation for readers in Germany

Das 17‑Meter‑Band hat eine ganz besondere Anziehungskraft, da es ein echtes DX‑Band ist. Es ist frei von Contests, weil es als wettbewerbsfreie Schutzzone gilt, hat aber dennoch eine sehr aktive FT‑8‑Gemeinde. Ich nenne es gern ein „Schleichband“, weil die CQ‑POTA‑, SOTA‑ und IOTA‑Fans es häufig nutzen – schließlich gelten diese Aktivitäten nicht als Contests!

So entgeht man den 45‑Minuten‑Extra‑Class‑Wundern, die normalerweise nur in Contests auftauchen, aber plötzlich lautstark CQ POTA rufen. Da 17‑Meter‑Antennen relativ klein ausfallen, eignet sich das Band hervorragend für portablen Betrieb beim Wandern oder Camping.

Bemerkenswert ist auch der selbstgebaute Diodenring, der als Balanced Modulator bzw. Product Detector dient und einen frontseitigen Schalter besitzt, um den Ring zum Abstimmen (Tune) bewusst zu entbalancieren. Als HF‑Leistungstransistor kommt ein MRF260 zum Einsatz.

Them that know, now don't care if you know.

73's

Pete N6QW





17M ~ The Sneaky Band

The IF is 4.9152 MHz and the LO is 23 MHz 17M, the Sneaky Band. Some 19 years ago, I built my 1st 17M transceiver and very much enjoyed wor...