I have an older tv that only has a coaxial hookup no RCA inputs or outputs. I'm trying to hook an Amazon firestick up. I need

[grlnboots]

HDMI input to Coaxial output converter?

 

[getochkn]

It more than likely won't work. Stick like that will only play content once the HDCP copy protection has been validated, which I doubt any box will and I think a HDMI to Coax would be rather complicated and expensive.

 

[americanaudiophile]

It could be done but would require more than one converter.
You would need to convert HDMI to AV
https://www.amazon.com/dp/B0732NF969/ref=asc_df_B0732NF9695291080/?tag=hyprod-20&creative=395033&creativeASIN=B0732NF969&linkCode=df0&hvadid=216539509836&hvpos=1o2&hvnetw=g&hvrand=4779635624446656209&hvpone=&hvptwo=&hvqmt=&hvdev=c&hvdvcmdl=&hvlocint=&hvlocphy=9004455&hvtargid=pla-350155148159
and then use a channel three RF modulator to convert AV to RF.
https://www.bestbuy.com/site/insignia-rf-modulator-black/4947028.p?skuId=4947028&cmp=RMX&extStoreId=1467&ref=212&loc=1&ksid=5b233906-4281-43d9-aaeb-fe11788b8aca&ksprof_id=16&ksaffcode=pg252604&ksdevice=c&lsft=ref:212,loc:2&gclid=EAIaIQobChMIiNqGpoPx1wIVGYGzCh3veg8DEAQYAiABEgKOWfD_BwE
If your TV is that old I would suggest that you can replace it cheaply enough or even for free since most TVs that are being discarded will have AV inputs. Check Craigslist. Any thrift shop should have something too.
The only streaming device that has AV outputs is the Roku Express Plus. That would eliminate the need for HDMI to AV conversion leaving the RF converter still required.