Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: Noclue on October 30, 2017, 12:20:08 pm

Title: Re:globeking 100a
Post by: Noclue on October 30, 2017, 12:20:08 pm

In the 50s i made up this radio and added a pen25 as an output valve .It worked ok .
So another 66 years to now and I've made the 100a again which works good with headphones but have not got the circuit for the add-on pen25 valve.
can anyone help by giving me the value of the components or better still a circuit.
im 83 and a little past it regards the workings of values etc.
HELP PLEASE

Title: Re:globeking 100a
Post by: SILVERGUN on October 30, 2017, 01:02:39 pm

Welcome Noclue,
I wasn't born til '69 so I can't be much help, but I found this stuff on the internet
http://www.r-type.org/exhib/aaa0373.htm (http://www.r-type.org/exhib/aaa0373.htm)
 
http://www.r-type.org/pdfs/pen25.pdf (http://www.r-type.org/pdfs/pen25.pdf)
 
http://www.vintageradio.me.uk/kits/globe_king.htm (http://www.vintageradio.me.uk/kits/globe_king.htm)
 

Title: Re:globeking 100a
Post by: Noclue on October 31, 2017, 03:58:16 am

Thanks for the reply.
I to have looked at this site and a few more to boot and the majority are all transformers coupled but i am looking for the part of the circuit from the triode output to the pentode input values, also the values of the components from the pen 25