If you are interested or building any of the HF Signals’ kits, you can join the BITX20 group by visiting https://groups.io/g/bitx20. That’s the only support we provide. The level of collective wisdom and experience on the Forum is enough to sort out almost any technical problem or question you may have. You will also meet some really great builders on the Forum. If you need information specific to your shipping, billing and other commercial matters, you can drop us a mail to hfsignals’ inbox at gmail. The mailbox is in the name of hfsignals followed by the regular gmail.com.