Review: Ham It Up v1.3

Review: Ham it Up v1.3


Last updated Nov 22 for price change, no other edits.
This review first appeared when the v1.3 was new on the market.

What is it?


A circuit board commonly called an upconverter, because it adds 125 MHz to received signal. RTL-SDR dongles only tune down to a maximum of 22MHz, so all the excitement on HF is not accessible.



How much?

Update: Currently $40 from the manufacturer's shop, I think the metal case is a must for $20. Can be ordered as port of various HF bundles.

First impressions


Upconverter arrived in proper signed-for and tracked bubble wrap envelope, in a sealed antistatic bag.
- This board would be at home in a ballistic rocket. Lots of thing to see and wonder at.
- Blue PCB is full with components, technically inclined enthusiasts can spend hours reading the different values for resistors and capacitors; the average user gets easy-to-understand "Antenna Input" and "Output" markings. What goes where is evident due to legible markings.
- LED lights mounted on the board look and feel extremely flimsy, a half millimeter gap between bottom and mount. You can move the lights left and right, so far didn't break off. Feels like it's a matter of time.
- No instructions on how to use your 50-dollar purchase. The video on the product website shows installation instructions for the older version.
- No USB-B power cable. This is not available in the webshop, nor mentioned on the order page that you need one. Go and hunt for "USB printer cable" if you don't have one, costs around 4 dollars on Ebay, ~ 6 dollars in any electronics shop, comes for free with any printer. Nooelec advised via email when this issue was raised that they sell power cables, quoting "10cm version SKU 100583 and a 3m version with dual ferrites, SKU 100580". Dual Ferrites are good for you, order one.
- Golden and USB power connectors are easy to see, fixed solidly, do not move even with excessive force.
- Passthrough switch is the same feel as older version, massive and audible, like kicking a motorbike into first gear.

Obvious differences compared to old v1.2 version


Info here will be only meaningful to someone thinking of upgrading, roll down if you don't have one.

- No separate oscillator, everything is mounted on the board. Looks like I wasn't the only one criticizing this.
- Power In changed place, so everything is reversed by look.
- Passthrough switch still next to output, Upconvert / HF mode setting still toward antenna out connector. No mental or finger recalibration needed.
- Much more mounting holes (eight versus two), same M4 metal screws can be used. Golden ring around holes much bigger, better contact for metal enclosures via screw head or washers.
- three LEDs inferior to old version: plastic holder move alarmingly when plugging in power cable. Repeating myself here, but it's terrible.
- What's it, a traffic light? With the old version, green meant good to go; the same green with the new one means that the board runs in upconverting mode. Yellow is power, and red is low battery.
- Clearly marked battery GND and V+ holes. Breadboard jumper cables fit the holes perfectly. This is a godsend if you use a Raspberry Pi as a dedicated RTL server  - less cabling in the enclosure without soldering.
- Noise source is ready to go, old v1.2 required components available separately for 10-plus dollars and soldering.


Performance


Much less conducted noise with phone or tablet chargers: the difference is hearing a weak AM broadcast station or listening to annoying buzzing.

Better commercial FM signal reduction: strong local station could be picked up even in Upconvert mode with the old board; new version is mute and clean as it's supposed to be.

Battery banks work: no 12V-to-5V downconverters needed for mobile / mains-free operation, simply plug the Ham-It-Up into a mobile phone battery bank and it will work. Batteries are the preferred power - less noise.

No bias-T. Powering a preamp at the antenna via coax cable from the Ham-It-Up not possible. RTL sticks sold by Nooelec do not come with bias-T, but even if you have a dongle with bias-T enabled, the LNA at the antenna in passthrough mode will not work.

For HF reception, the Ham-It-Up works as advertised: helps the RTL dongle to receive radio signals below 30 MHz. Used it for shortwave broadcasts, found radio amateurs beeping greetings in CW mode, listened to Approach -- Ground instructions moments after enjoying morning news on shortwave.
The key selling point for the Ham-It-Up is versatility for beginners; use the same discone for monitoring local action, then lay back, flick a switch and get a surprise broadcast with unfamiliar tunes from the other side of the world.
Experimenting beginners will revel in the possibility of chasing weak HF signals, adding preamps and erecting increasingly larger and complicated wire abominations "just to <enter unjustifiable reason here>".
Advanced users will love the populated noise source, easier battery operation and integration into a dedicated HF-only setup.
For 40 dollars, it is good value considering the feature set, but don't forget add-on expenses:
- power cable,
- $20 for metal enclosure,
- $10 for Balun One Nine,
- $3 for SMA to use noise source (it's a matter of time before you'll think using it)
- $30 for a HF preamp,
- toroids, dedicated RTL stick  with Raspberry as RTL server, enclosures, the list is long.

Competitors


The Spyverter has been found in other reviews to have better ultimate performance, but it is 15 dollars more expensive and does not come with a passthrough switch. For people with lots of letters after their name it's not a disadvantage, but for newbie Joe and Jane, it means that the shiny new discone will be less flexible. Of course, throwing out a longwire is preferred for HF signals, but what if you can't or don't want the hassle?
The HF driver mod, courtesy of Oliver Jowett, is a free software mod and requires no money on the table - download and extract files from the link, cut and paste necessary files into the SDR# folder and hope to find something below 30 MHz.



Strong broadcast stations usually come in, but sometimes don't, stations occasionally pop up as low as 6MHz, but it's rare. It's a great introduction to shortwave signals during the day, but incomparable to a purpose-built device.
[Knowing how long it takes to put a post like this together, I can't imagine the amount of work that went into developing those drivers. Kudos and deepest respect to Oliver for making the drivers available for free, but I had to point out they are not a replacement for hardware]

But I need a long wire (or something large) to listen to shortwave


That's not true. The "you need long wires" myth is archaic, outdated and does not take the power of software enhancements into consideration.

Check this out, old vs new Ham-It-Up:

That's a broadcast station on 7350 kHz with an RTL-SDR.com Silver dongle, Ham-It-Up upconverter and a 20" / 50 cm extendable antenna. Not the best, but listenable.
With the stock antenna and some clever mods, the old v1.2 and a cheap RTL stick has been used extensively to listen to shortwave broadcasts during my travels. You won't copy hams on CW, nor I ever felt inclined to do so six timezones away from home after a 10-hour flight. Your mileage, and long-haul resistance may vary.

5 comments:

  1. Could you get into habit to DATE you posts?

    ReplyDelete
    Replies
    1. YES!!! Just LIKE you put the DATE on the COVER of your book.
      TNX!
      sdrPLAY, airspyJR, blues, nano, SILVERS...pcr-1000

      Delete
    2. This is all done for FREE. Stop making demands and create your own blog the way you want.

      Personally, I'm thankful for the time invested by the author, and I'm not going to criticise the font, background colours or other aspects.

      Delete
  2. halfway through this article, i went on and purchased the new hamitup v1.3 from nooelec's ebay store. it was in my 'shopping basket' for the past few months and plan to order your book while waiting for it to arrive. keep up the great work and i look forward to find out how my raspberry pi (B+) can play along with the upconverter. thank you and sincerely, i am ~
    ps: your dongles comparison is the best!

    ReplyDelete
  3. I purchased the version 1.3 as soon as it came out. I have found mine to work flawlessly with the only weak point being when receiving a SSB signal in the ham bands. Using SDR# it is rather hard to tune. I decided on the ham-it-up over the competitors mostly because of the noise source.
    As noise sources go it is one of the better ones concerning a flat response through 2 GHZ.
    There are many things a noise source can be used for. Some of the uses can be found on video from the same person who made this https://www.youtube.com/watch?v=SAAF2FvV9g4
    The author has several videos on the subject and it is a good way to start learning about antenna and filter design.
    The converter has an insertion loss of 10 DB. With the RTL-DVD dongel this is seldom a problem. The use of a pre amplifier is very over emphasized and usually causes more problems than it is worth. I often use attenuation rather than amplification to prevent over driving the front end of the RTL-SDR. Only on occasion do I use amplification and then only in conjunction with appropriate filters. The lack of bias T is not a problem as you will find a DC insertion that has a variable voltage controlling gain to be superior.

    Joe KA9UCN

    ReplyDelete