Not compliant on 10m?

[John Harper (AE5X)]

Does anyone know what is being referred to in Apache Labs' chart comparing the Anan-10E to the HL2?

https://apache-labs.com/product-detail/anan-10e-revised-hf-6m-sdr-transceiver-preorder

Is it an IMD issue?

[Doug Lung]

Not sure what they mean about non-compliant. Perhaps tested without the filter board? 

Be careful with Apache Labs. I sent them $100 by PayPal (payment confirmed) for an Anan-10E enclosure over two years ago after buying the 10E board and 10 watt amp and filter board. I never got a notice of shipping or request for shipping payment. Several emails to support with copies of the PayPal receipt were never answered. Still hoping it will show up some day. 

While waiting I started to design my own enclosure but before cutting metal discovered the HL2 package with enclosure and filter board from Makerfabs and great support from Steve's web site and this group so I stopped work on it. I still have the Anan boards. Perhaps one day I'll wire them up. With all the MCX to SMA cables needed, jumpers between boards, power to the boards, etc. it is a lot more complicated to assemble than the HL2 boards. 

Doug

AH6DL

[John Harper (AE5X)]

I checked the spectrum on 10m (and all other bands) and it is well within spec. Probably either false advertising from Apache Labs or an IMD issue. I'll do a 2-tone test later.

[Steve Haynal]

Hi John,

Various testing of the Hermes-Lite 2 shows that it is FCC compliant on 10M:

https://github.com/softerhardware/Hermes-Lite2/wiki/Performance-Tests#transmit-power-amplifier

I am not sure what Apache Labs is referring to here and I have sent a clarification inquiry to them.

If I were to guess, a few prototypes of the original Hermes-Lite (not the Hermes-Lite 2) did have a spur in the 22-25 MHz range, but that was addressed by changing what features and modes we use on the AD9866. The Hermes-Lite 2 and all derivatives I know of (radioberry, square sdr) inherit these changes and no AD9866 based SDRs exhibit problems with 10M FCC compliance which I am aware of.

If you want to learn more, search for "spur" in this group and read some of the earliest posts from 2015-2016.

https://groups.google.com/g/hermes-lite/search?q=spur

On the web page which you share, Apache Labs does not mention some of the ways in which the HL2 is superior to the Anan-10E in my opinon:

1. The HL2 supports 4 slice receivers, not just 2. This is due to improvements in the FPGA gateware code which Anan-10E does not have.
2. The HL2 has alternate FPGA gateware which supports 10 slice receivers in a receive-only limited filter mode. This caters to those who wish to use the HL2 for skimming of all HF amateur bands.
3. The HL2 price point is considerably lower.
4. The HL2 is completely open source, even including the PCB design files and manufacturing flow. 

73,

Steve

kf7o