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6AL5W-Martin · 3rd Apr 2018, 4:00 pm

the compare to R388 is not easy.

R388 is a slug tuner, and the count of slugs is smaller then the count of bands (1MHz step).
E104 use a XXL variable C for tuning. The input stage use in each band input 3 tuned coils, one at the G1, and a couple at anode.
This preselection is amazing !

the first IF of R388 is one frequency (I am not shure but I think 2 to 3 MHz, center = 2,5)
the first IF of E104 is related to the bands:
Band 1+2 straight forward, oscillator OFF, but all coils are tuned
Band 3, 4, 5: 1,1 to 2,2MHz
Band 5 to 17: 1,8 to 4,1MHz

R388A have the greathful mechanical filters,
E104 use 3 crystals only. Here the collins win.

sensitivity, fishing of small signals:
R388 around 10kT
E104 <7kT, side band reception works from 0,13µV, AM from 0,3µV
here the collins stand in the rain. The Telefunken IF is much more quiet but the antenna cable noise must be small enough to use that in reality.
additional E104 can listen F3.

R388 have a very easy and accurate frequency scaling,
E104 is not so fine, bec. there are 2 IF frequency it have no kHz scaling in the fine tunig knob. The collins win in accuracy.

Weight class. E104 is more then 3 pcs. of the collins in weight,
the collins win

The brother radio E108Lw4 (10kHz up to 1,8MHz) can be in compare to R389.
I have them both now, the plan is to run a great Telefunken Set

Here is a R388A (51j4) at home, so I know this radio also well.
On the wish list: RA17 from UK ! I need one from this amazing radios.

greetings
Martin

3rd Apr 2018, 4:00 pm	#4
6AL5W-Martin Hexode Join Date: Nov 2006 Location: Biedenkopf, [Hessen], Germany. Posts: 425	Re: Telefunken SW Radio the compare to R388 is not easy. R388 is a slug tuner, and the count of slugs is smaller then the count of bands (1MHz step). E104 use a XXL variable C for tuning. The input stage use in each band input 3 tuned coils, one at the G1, and a couple at anode. This preselection is amazing ! the first IF of R388 is one frequency (I am not shure but I think 2 to 3 MHz, center = 2,5) the first IF of E104 is related to the bands: Band 1+2 straight forward, oscillator OFF, but all coils are tuned Band 3, 4, 5: 1,1 to 2,2MHz Band 5 to 17: 1,8 to 4,1MHz R388A have the greathful mechanical filters, E104 use 3 crystals only. Here the collins win. sensitivity, fishing of small signals: R388 around 10kT E104 <7kT, side band reception works from 0,13µV, AM from 0,3µV here the collins stand in the rain. The Telefunken IF is much more quiet but the antenna cable noise must be small enough to use that in reality. additional E104 can listen F3. R388 have a very easy and accurate frequency scaling, E104 is not so fine, bec. there are 2 IF frequency it have no kHz scaling in the fine tunig knob. The collins win in accuracy. Weight class. E104 is more then 3 pcs. of the collins in weight, the collins win The brother radio E108Lw4 (10kHz up to 1,8MHz) can be in compare to R389. I have them both now, the plan is to run a great Telefunken Set Here is a R388A (51j4) at home, so I know this radio also well. On the wish list: RA17 from UK ! I need one from this amazing radios. greetings Martin __________________ www.wellenkino.de Vintage Scope restorations Last edited by 6AL5W-Martin; 3rd Apr 2018 at 4:09 pm.