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Treetop Circuits 

Owner’s Manual for SB-51 SSB adapter 

Version 4 

 

 

 

 

Fig. 7 – SB-51 schematic. 

Содержание SB-51

Страница 1: ...The SB 51 comes as a PC board ready to install and operate It plugs into the radio in place of the detector AVC tube V110 Fig 2 and most connections are made through the tube socket In addition two op...

Страница 2: ...points so please do not hesitate to e mail But please also bear in mind that there is no substitute for basic electronic skills and good workmanship And as always remember that voltages approaching 3...

Страница 3: ...or below the IF passband With an SSB signal best performance requires that the BFO be placed on the correct side of the passband and ideally just outside it Correct settings can be found by trial and...

Страница 4: ...N 10 CALIBRATE ON AVC OFF LIMITER OUT AUDIO GAIN ADJUST AS REQUIRED BAND CHANGE 3 5 4 5 MEGACYCLES 2 If you removed the knob put it back on and temporarily tighten one setscrew Orientation doesn t mat...

Страница 5: ...Remove V110 and its shield In most radios the shield base can remain in place but remove it if there is insufficient clearance Mount the clamp as in Fig 1 The lockwasher goes under the nut Remove the...

Страница 6: ...ortion from 28 to 28 5 megacycles is designated 10A the portion from 28 5 to 29 5 megacycles is 10B and the portion from 29 5 to 29 6 megacycles is 10C If you never need to listen to SSB outside the h...

Страница 7: ...In general as you move to narrower bandwidths you will find that the best setting is closer to the center of the range as in Fig 5 or 6 Fig 5 A typical ham band setting for a narrow band filter Fig 6...

Страница 8: ...Treetop Circuits Owner s Manual for SB 51 SSB adapter Version 4 8 Fig 7 SB 51 schematic...

Страница 9: ...hold set by R6 and R7 For AM reception the BFO is switched off The output of U1D goes positive Q1 saturates applying nearly 56 volts to the anodes of D1 and D3 so they do not conduct Current flows thr...

Страница 10: ...he product for any reason you can ship it back to us Provided that it is shipped within 30 days of your receiving it and we receive it in good shape we will credit your PayPal account with the amount...

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