A good Sherwood 7100 or 7100-A. Available on eBay for around a hundred to two hundred bucks. Here's an exceptional one:
https://www.ebay.com/itm/Sherwood-S-7100a-Receiver-Fully-Recapped-Restored-Beautiful-Condition/223696688384?hash=item34155c9500:g:PsQAAOSwLIZdm-ZF
Frank
https://www.ebay.com/itm/Sherwood-S-7100a-Receiver-Fully-Recapped-Restored-Beautiful-Condition/223696688384?hash=item34155c9500:g:PsQAAOSwLIZdm-ZF
Frank