05-02-2020, 03:19 AM
Greetings everyone, I just recently bought a 1948 Radio City Products Signal Generator Model 705A which according to the original manual that I downloaded from the BAMA website is an AM and FM Signal Generator that has a frequency range of 100 kilocycles to 25 Megacycles across 6 band selsections and then with the use of Harmonics it has a frequency range entension of up to 150 Megacycles.
This unit uses Banana Jacks for all but one of the connections, the RF Lo Output uses the old Switchcraft Microphone Jack like my Heathkit SG-8 used, and the RF Hi output and the AF input/output jacks are of the Banana plug variety of jacks, the unit did come with a Switchcraft Microphone jack to RCA plug adaptor (at least I think its an RCA Plug, it could be a Banana Plug but I'm not sure).
I just finished recapping the unit as it had its original paper caps in it yet and an older replacement electrolytic capacitor that I swapped out for a modern set of capacitors.
Anyways I was wondering if there would be a way to make some test leads or adaptors for this thing that would utilize the existing Banana Plug so that I could use the RF Hi output to hook up to a frequency counter to check the unit's accuracy (which according to the original manual its supposed to be a very accurate unit, an accuracy of 2%, with the ability of being able to achieve an accuracy rate of 1% or less.
It also isn't supposed to have issues with drifting or anything else like that as well according to the manual.
The manual is posted below.
Any help with this unit would be appreciated.
This unit uses Banana Jacks for all but one of the connections, the RF Lo Output uses the old Switchcraft Microphone Jack like my Heathkit SG-8 used, and the RF Hi output and the AF input/output jacks are of the Banana plug variety of jacks, the unit did come with a Switchcraft Microphone jack to RCA plug adaptor (at least I think its an RCA Plug, it could be a Banana Plug but I'm not sure).
I just finished recapping the unit as it had its original paper caps in it yet and an older replacement electrolytic capacitor that I swapped out for a modern set of capacitors.
Anyways I was wondering if there would be a way to make some test leads or adaptors for this thing that would utilize the existing Banana Plug so that I could use the RF Hi output to hook up to a frequency counter to check the unit's accuracy (which according to the original manual its supposed to be a very accurate unit, an accuracy of 2%, with the ability of being able to achieve an accuracy rate of 1% or less.
It also isn't supposed to have issues with drifting or anything else like that as well according to the manual.
The manual is posted below.
Any help with this unit would be appreciated.
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