The Bogen uses 7355 output tubes for a total of around 35 watts per side.
That's theoretically twice the power,, but the Dynaco will push moderatley sensitve speakers just fine.
7355's are getting a bit scarce but you can find them. You'll find tons of info on the Dynaco and most parts are readily available, along with a ton od advice on mods. It'll be cheaper to refurb and uses EL84's, for which there are a whole lotta options.
Here's the specs on the Dynaco:
Inputs: Low and high level magnetic phono, ceramic phono, NAB 7-1/2" tape head, radio, tape, spare
Outputs: Tape, 8 and 16 ohm speakers, center channel loudspeaker, headphone provision.
Controls: Selector, Volume, Balance, Blend, Individual Treble and Bass for each channel, Tape Monitor, Loudness, Scratch Filter, Power.
Power:
35 watts continuous;
45 watts IHF music power (both channels).
Frequency Response: ±.5 dB 10 cps to 40 kc. Response not affected by position of volume control.
Power Response: 20 cps to 20 kc without exceeding 1 percent distortion within 1 dB of 17.5 watts, each channel)
Tone Control Range:
±12 dB at 15 kc;
±12 dB at 50 cps.
Sensitivity for rated output:
2.5 mV at tape head;
4 mV at low level magnetic phono;
1 volt at high level.
IM Distortion:less than 1 percent at 17.5 watts (each channel), less than 0.2 percent at average levels.
Hum and Noise:
70 dB below 10 millivolt input for rated output on low level inputs;
80 dB on high level.
Power consumption: 110 watts, 120 volts, 60 cycle AC (120/240 volt, 50/60 cycle operation available with optional PB-028 transformer).
Tube complement: 12AX7/ECC83 (2), 7199 (2), 6BQ5/EL-84/7189 (4)
Silicon diodes: 500 mA, 1000 PIV (2)
