|
Title: Digital Dial for Collins 75A4 Post by: jimmy on October 09, 2015, 10:38:51 PM Would someone please help. I need to know what tube is called a PTO tube in the A4. In the instruction I received with the unit it says remove the tube shield from the oscillator tube or the oscillator buffer tube.in the A4. The tube
number or the V number would sure help. Jimmy K5CSU Title: Re: Digital Dial for Collins 75A4 Post by: DMOD on October 09, 2015, 11:04:58 PM http://collinsradio.org/archives/manuals/75A-4-_3rd-ed-03-57_-Sec1.pdf http://collinsradio.org/archives/manuals/75A-3%20(02-53)Schemsma.pdf Phil - AC0OB Title: Re: Digital Dial for Collins 75A4 Post by: KB2WIG on October 09, 2015, 11:08:25 PM Go here..... http://jptronics.org/Collins/ klc ya beat me toit Title: Re: Digital Dial for Collins 75A4 Post by: N3GTE on October 11, 2015, 12:00:01 PM Hey Jimmy, AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
You are looking for V15 and V16 they are 6BA6's in the middle towards the front of the set. Terry N3GTE |