23-04-2017, 07:20 PM
Hi.
It makes sense to have two RF amps rather than have two IF amps in this set. The IF frequency is low so to get the bandwidth the stage gain is low, I'm sure Brian will confirm this.
At Band 1 RF frequencies it is easier to get the bandwidth and useful gain so I would believe the "engineer" doing the mod realised the issues of keeping a reasonable IF band with and trying to extract useful gain, especially with the choice of valves around at the time.
It makes sense to have two RF amps rather than have two IF amps in this set. The IF frequency is low so to get the bandwidth the stage gain is low, I'm sure Brian will confirm this.
At Band 1 RF frequencies it is easier to get the bandwidth and useful gain so I would believe the "engineer" doing the mod realised the issues of keeping a reasonable IF band with and trying to extract useful gain, especially with the choice of valves around at the time.
