Hi,
No, I'm fairly sure that it's not compatible with the 308x, certainly not worth the risk of shipping from NZ, without a lot more discussion/investigation.
But we can start with a very simple check. Look inside the "Rain" socket of the transmitter and see if there are 4 or 6 "gold wires". The Solar-compatible transmitters will have 6 because there are 6 cores in the cable (although only 5 are used).
I couldn't see in the original photo (on my PC screen) but Paintshop Pro has done an excellent job and I think we can say that yours has only four wires.
WH14contacts.jpg
I presume this follows on from the discussion in the
Photos of ..... sticky in the FO section and I can really only reiterate my suggestions there:
1. Check if Signatrol have a "compatible" spare part. Or,
2. a. Use a "Maplin" transmitter with the Rain cable plugged directly into the transmitter. However, it will not transmit the two additional data packets for the Solar Data and the RCC. But as has been discussed elsewhere, the RCC can actually be a negative feature.
b. Wire a pair of NiMH AAA cells inside the Solar Pod (2 x AAA battery holders are easily available, but do require a fair amount of "surgery" on the inside plastics moulding of the Pod base).
c. Add a 434 MHz transmitter module inside the Solar Pod.
d. Adapt the Pod to attach directly onto the Wind mast. I used one of the "arms" for the transmitter or rain sensor (since neither is really best located on that mast), coupled by a short length of plastic tube (water pipe).
I've done the above as a trial and it's probably an easier modification than extending the Solar Pod cable. IMHO the External Temperature sensor/Transmitter really needs to be located in a "shadly" position and not below the Pod.
Cheers, Alan.