WOW!!!COOL!!Brings back memories!!!I used to have that very catalog.Just like those old days---Garrad,dual,AR TT's-Dynaco amps(built a few of those from kits-lets see-PAT-$,St70.st120,St400)and some Heathkits.some of that equipment was used in radio stations-typically small town 1kw AMs and small FM stations-the Revox and Tandberg tape machines.And some radio stations used the st70 amps as monitor amps for studio or transmitter sites.got a few that way-now I am regretting getting rid of them!!the St was so simple yet so effective!The Scott tuner amps used in those console hi fi pictured in the links.Used to have one-Got lost in a flood nice unit.their BIG output transformers for the power of the amp sure gave good power DEEP BASS response unmatched by others--funny todays audiophiles are noticing that-and those little Scott tubed amps command a top price-more than the $50 I paid for one years ago.no long ago I got a catalog that listed them for close to $2000 each!Search your attics and basements and thrift stores,swap shops.Probably can find ones for a better price.I now remember when I held and had that 1969 Allied book!!spent many evenings reading thru it after my high school homework!You could send in the post card in Popular electronics magazine and get your own at the time-My Dad subscribed to PE and passed those to me.Sent out MANY postcards in those days!!Wished I still had the Doco!!