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Vintage Amateur and Military Radio Amateur/military receivers and transmitters, morse, and any other related vintage comms equipment.

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Old 5th May 2023, 7:33 pm   #1
G4YVM David
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Default Racal log periodic

I am continuing to sell the SK stuff I started recently...some interesting stuff which I can offer here first so please look.
However, there are two NOS Racal Type 752 log periodics I have in their cases and they look never used.

Thing is, I cant find a reference for type 752. The racal catalogue 1986 shows a type 751, 30 to 76 MHz but no mention anywhere of a 752.

Anyone shed any light?
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Old 5th May 2023, 7:44 pm   #2
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Default Re: Racal log periodic

Just measure the lengths of the shortest and longest elements, assume to be halfwaves and you've got the max and min frequencies. Then count the number of elements. This gives you the number of elements per octave which is a fair indicator of gain and return loss ripple. A shufti at the connector will tell you whether its 50 or 75 ohms.

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Old 5th May 2023, 8:22 pm   #3
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Default Re: Racal log periodic

Ta for that. Obvious really...
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Old 6th May 2023, 1:44 am   #4
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Default Re: Racal log periodic

Type MA752 30-88MHz
General spec:- Input impedance 50 Ohm
Power:- 400 watts
VSWR:- 2.6:1
Gain:- 7dbi

Found in a PW ad from 1994
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Old 6th May 2023, 7:05 am   #5
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Default Re: Racal log periodic

Thanks. I saw that but can't be sure a Moonraker aerial is the same. I ASSUMED but...as you know about assumptions. The type 751 is also that spec so I guess the 752 is a slight variation

Thanks though.
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Old 6th May 2023, 12:11 pm   #6
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Default Re: Racal log periodic

Don't think you saw the same ad I did :-
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Old 6th May 2023, 7:03 pm   #7
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Default Re: Racal log periodic

Thanks Terry.

Thats my antenna.. My masts too...
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Old 27th May 2023, 10:37 pm   #8
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Default Re: Racal log periodic

I think there is a typo in the advert. Racal Antennas numbers generally used the prefix "RA" so it would be RA752, not MA752.

RA752 data is attached.

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