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Reviews Categories | Ham radio kits | Oak Hills Research DD-1 Digital Display Help

Reviews Summary for Oak Hills Research DD-1 Digital Display
Oak Hills Research DD-1 Digital Display Reviews: 11 Average rating: 4.7/5 MSRP: $100 plus shipping (Mar 2010)
Description: Six digit programmable frequency counter which can be used as a digital display on any transceiver.
Product is in production.
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NG9D Rating: 5/5 Apr 3, 2010 06:30 Send this review to a friend
Great Accessory for Analog Rigs  Time owned: 0 to 3 months
Building this kit, wiring VFO connections in four Ten-Tec QRP radios and programming DD-1 took about a day. There was only one part that OHR was short (2N3904) and they offered to send it to me, but I lucked out and found one in my spare parts bin in the meantime.

The instructions are clear. Voltage checks are provided before inserting the integrated circuit chips into the sockets and final adjustment and assembly. Fit and finish is great.

The DD-1 has five programmable memory channels so you can use it with various different radio intermediate frequencies. For example, my four Ten-Tec QRP rigs all have differing intermediate frequencies (some with reverse counting). I show this in a demonstration video at
The offsets are push-button selectable from the front panel.

You can set it for either 100 Hz or 1 kHz resolution and for a digit blanking battery saving mode that comes to life when the frequency changes. The anti-jitter code works.

The unit is supposed to work up to 50 MHz. I have used it from 3.5 to 14 MHz and it works fine for me, without introducing any noticeable noise into my Ten-Tec T1300 series QRP transceivers.

73 de NG9D
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